Welcome to the website where you can pass online the CBT test on the subject «COLREG (Rev. 7)». Practice like this will help you as a marine specialist improve your knowledge with the help of online studying and appraisal practice. CBT based on practical information and marine specialists experience.
CBT tests developed for evaluating seaman basic knowledge by Seagull Company (rebranded as «OTG»), is an evaluating online-tool, used for revealing any professional preparation needed in specific fields of knowledge, defined by STCW.
- Test type: STCW.
- Module: 0172.
- Subject: International Collision Regulations.
- Revision: 7.
- Vessel type: any.
CBT tests have proven themselves as good tools for the selection and recruitment process, as well as advancing the level of knowledge of the current officers and crew. Ocean Technologies Group use various subjects for question creation, which includes:
- Crowd and Crisis Management;
- Integrated Navigation System (INS);
- Ballast water management;
- Handling and Stowage;
- Vessel operation management and safety;
- Marine engineering;
- Maintenance and repair, etc.
Current test contains Seagull CBT questions on the subject «International Collision Regulations (Rev. 7)». Those questions can be used for competence verification specialist capable of preventing accidental situations related with transporting safety, or also for self-examination.
«COLREG» subject includes theoretical and practical information about advanced training for work on any type of vessel. Knowledge of this information directly shows employee’s competence who holds a relevant post on any type of vessel. Individuals trained in CBT 0172 International Collision Regulations (Rev. 7) are responsible for ensuring compliance with international collision regulations while navigating a vessel. Their duties include understanding and applying the rules of the road at sea, maintaining a proper lookout, and taking appropriate actions to prevent collisions. These individuals play a crucial role in promoting maritime safety by effectively implementing collision avoidance measures and responding to navigational challenges in accordance with the established regulations.
On this site Crew Evaluation System Test on the subject «International Collision Regulations» contains 45 questions you need to answer with no possibility to go back to previous question. Therefore, we recommend carefully reading each question and making decision with no hurry. In case you have some difficulty answering, you have also possibility to request a hint.
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Amount of questions: 45.
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The vessel is sighted astern. Range is determined by radar as 2 miles distant and is reducing. TCPA 7 minutes. What action should the OOW take?
Sound 5 or more short rapid blasts on the ship's whistle. This may be accompanied by a light signal of five or more short and rapid flashes.
Alter course to port, sounding one short blast on the whistle.
Alter course to starboard, sounding one short blast on the whistle.
Maintain course and speed and continue to monitor the situation.
On this radar screen in a North Up, true motion display. Range is set to 6 nm and the vessel is navigating in restricted visibility of less than 500 metres. The vectors shown are true vectors and set to 12 minutes length. What action may the OOW take?
Maintain course and speed, continue to monitor the situation.
Establish if risk of collision exists or a close quarter situation is developing.
Commence sounding the fog signal.
Make a bold alteration of course to starboard, and sound one short blast.
Make a bold alteration of course to port.
The vessel is sighted 40° on the port bow, range 8 miles. What is the first action the OOW should take?
Maintain course and speed.
Alter course to starboard, sounding one short blast on the whistle.
Establish if risk of collision exists, and/or a close quarter situation is developing.
Alter course to port, sounding one short blast on the whistle.
The following table shows target data displayed on a north up, stabilised ARPA radar for the target echo indicated on the radar screen. The vessel is navigating in restricted visibility of less than 500 metres, own vessel course steered 000° speed 12,00 knots. What action should the OOW take?
Maintain course and speed, continuing to monitor the situation.
Make a bold alteration of course to starboard and then continue to monitor the situation.
Make a bold alteration of course to port and then continue to monitor the situation.
The vessel is sighted directly astern, range 6 miles. What action should the OOW take?
Maintain course and speed and continue to monitor the situation.
Alter course to starboard, sounding two short blasts on the whistle.
Alter course to port, sounding five short blasts on the whistle.
Alter course to port, sounding one short blasts on the whistle.
The vessel is sighted 20° to port, distance off is less than 2 miles. Risk of collision exists. Which two actions may the OOW take?
Alter course to port, sounding two short blasts on the whistle.
Alter course to starboard, sounding one short blasts on the whistle.
Maintain course and speed and continue to monitor the situation.
Maintain course and speed.
The vessel is sighted 50° abaft the port beam, distance off determined by radar is 2 miles. TCPA 8 minutes. Risk of collision or a close quarter situation is developing. Which two actions may the OOW take?
Alter course to starboard, sounding one short blasts on the whistle.
Sound five short and rapid blasts on the ship's whistle.
Alter course to port, sounding two short blasts on the whistle.
Maintain course and speed, continuing to monitor the situation.
On this radar screen in a North Up, true motion display. Range is set to 6 nm and the vessel is navigating in restricted visibility of less than 500 metres. The vectors shown are true vectors and set to 12 minutes length. What action may the OOW take?
Make a bold alteration of course to starboard, and sound one short blast.
Establish if risk of collision exists or a close quarter situation is developing.
Make a bold alteration of course to port.
Maintain course and speed, continue to monitor the situation.
What do the Rules tell OOW to do?
Keep out of the way of the other vessel.
Maintain course and speed, continue to monitor the situation.
Slow down.
Altcourse to starboard, sounding one short blast on the whistle.
Sighted 30° to starboard. What action must the OOW take?
Determine if risk of collision or a close quarter situation is developing.
Increase speed.
Sound five or more short and rapid blasts on the ship's whistle.
Alter course to port.
Sighted 30° on the starboard bow, risk of collision or a close quarter situation is developing. What action should the OOW take?
Bold alteration to starboard, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Bold alteration to port, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Bold alteration to starboard, sounding two short blasts on the ship's whistle and may add a light signal of two short flashes.
Sound five or more short and rapid blasts on the ship's whistle and maintain course and speed.
The vessel is sighted right ahead, distance off determined by radar is 3 miles. What action should the OOW take?
Alter course to starboard, sounding one short blast on the whistle.
Alter course to port, sounding one short blast on the whistle.
Maintain course and speed, continue to monitor the situation.
Sound five or more short and rapid blasts on the ship's whistle.
Sighted 90° on port bow, distance off determined by radar is 2 miles. Risk of collision or a close quarter situation is developing. Which two actions may the OOW take?
Bold alteration to starboard, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Sound five short and rapid blasts on the ship's whistle.
Maintain course and speed, continue to monitor the situation.
Bold alteration to starboard, sounding two short blasts on the ship's whistle and may add a light signal of two short flashes.
Sighted 30° on port bow, distance off determined by radar is 5 miles. Risk of collision or a close quarter situation is developing. What action should the OOW take?
Maintain course and speed, continue to monitor the situation.
Bold alteration to starboard, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Increase ships speed to maintain course and sound five short and rapid blasts on the ship's whistle.
Bold alteration to starboard, sounding two short blasts on the ship's whistle and may add a light signal of two short flashes.
Sighted abeam to starboard, distance off determined by radar is 2 miles. What action may the OOW take?
Bold alteration to starboard, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Bold alteration to port, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Increase speed.
Sound five or more short and rapid blasts on the ship's whistle and maintain course and speed.
Your vessel is within a TSS. The vessel is sighted 20° to starboard, distance off is less than 4 miles. TCPA 30 minutes. Risk of collision determined to exist. What action may the OOW take?
Maintain course and speed, continue to monitor the situation.
Alter course to starboard, sounding one short blast on the ship's whistle.
Maintain course and speed.
Alter course to port, sounding two short blasts on the ship's whistle.
On this radar screen in a North Up, true motion display. Range is set to 6 nm and the vessel is navigating in restricted visibility of less than 500 metres. The vectors shown are true vectors and set to 12 minutes length. What action may the OOW take?
Maintain course and speed, continuing to monitor the situation.
Commence sounding the fog signal.
Make a bold alteration of course to starboard, and sound one short blast.
Make a bold alteration of course to port.
On this radar screen in a North Up, relative motion display. Range is set to 6 nm and the vessel is navigating in restricted visibility of less than 500 metres. The vectors shown are relative vectors and set to 12 minutes length. What action may the OOW take?
Make a bold reduction in speed, and stop if considered required.
Sound five short and rapid blasts on the ship's whistle.
Make a bold alteration of course to starboard, and sound one short blast.
Maintain course and speed.
On this radar screen in a North Up, relative motion display. Range is set to 6 nm and the vessel is navigating in restricted visibility of less than 500 metres. The vectors shown are relative vectors and set to 12 minutes length. What action may the OOW take?
Slow down slightly.
Maintain course and speed.
Sound five short and rapid blasts on the ship's whistle.
Make a bold alteration of course to starboard.
The vessel is sighted 30° abaft the port beam, distance off determined by radar is 2 miles, TCPA 16 minutes. Risk of collision or a close quarter situation is developing. What action should the OOW take?
Sound five or more short and rapid blast on the ship's whistle. This may be accompanied by a light signal of five or more short and rapid flashes
Maintain course and speed, continuing to monitor the situation
Alter course to starboard, sounding one short blast on the whistle
Alter course to port, sounding two short blasts on the whistle
Sighted abeam to starboard, distance of 2 miles, risk of collision exists. What action may the OOW take?
Increase speed.
Bold alteration to port, sounding one short blast on the ship's whistle and may add a light signal of one short flash
Sound five or more short and rapid blasts on the ship's whistle and maintain course and speed
Bold alteration to starboard, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Sighted 80° to starboard, distance of 1 mile, risk of collision exists. What action may the OOW take?
Bold alteration to port, sounding two short blasts on the ship's whistle and may add a light signal of one short flash.
Sound five or more short and rapid blasts on the ship's whistle and maintain course and speed.
Bold alteration to starboard, sounding two short blasts on the ship's whistle and may add a light signal of two short flashes.
Make a large reduction in speed.
On this radar screen in a North Up, relative motion display. Range is set to 6 nm and the vessel is navigating in restricted visibility of less than 500 metres. The vectors shown are relative vectors and set to 12 minutes length. What two actions may the OOW take?
Make a bold alteration of course to starboard, and sound one short blast
Make a bold alteration of course to starboard
Slow down and if required stop
Sound five short and rapid blasts on the ship's whistle
The vessel is sighted 30° on the port bow, distance off determined by radar is 4 miles. Risk of collision or a close quarter situation is developing. Which two actions from the following options may the OOW take?
Alter course to port, sounding two short blasts on the whistle
Alter course to starboard, sounding one short blast on the whistle
Maintain course and speed, continuing to monitor the situation
Establish if risk of collision exists, and or a close quarter situation is developing
The vessel is sighted 30° abaft the port beam, distance less than 1 mile, CPA 0,1 mile, TCPA 4 minutes. What action should OOW take?
Alter course to starboard, sounding one short blast on the whistle.
Establish if risk o f collision exists, and or a close quarter situation is developing.
Maintain course and speed, continuing to m onitor the situation.
Alter course to port, sounding two short blasts on the whistle.
The vessel is sighted right ahead, distance off determined by radar is 2 miles. What action should the OOW take?
Alter course to port, and sound two short blasts on the whistle.
Alter course to starboard, sounding one short blast on the whistle.
Maintain course and speed, continuing to monitor the situation.
Sound five short and rapid blast on the ship's whistle and maintain course and speed.
Sighted 60° on port bow, distance off determined by radar is 1 mile. Risk of collision or a close quarter situation is developing. What action should the OOW take?
Sound five or more short and rapid blast on the ship's whistle. This may be accompanied by a light signal of five or more short and rapid flashes .
Bold alteration to starboard, sounding two short blasts on the ship's whistle and may add a light signal of two short flashes .
Bold alteration to starboard, sounding one short blast on the ship's whistle and may add a light signal of one short flash .
Increase ships speed to maintain course and sound five short and rapid blasts on the ship's whistle.
The vessel is sighted 30° on the port bow, distance off determined by radar is 4 miles. Risk of collision or a close quarter situation is developing. Which two actions from the following options may the OOW take?
Establish if risk of collision exists, and or a close quarter situation is developing.
Maintain course and speed, continuing to monitor the situation.
Alter course to port, sounding two short blasts on the whistle.
Alter course to starboard, sounding one short blast on the whistle.
The vessel is sighted 30° to starboard, range 9 miles. What action should the OOW take?
Maintain course and speed and continue to monitor the situation.
Alter course to starboard, sounding one short blast on the whistle.
Alter course to starboard, sounding two short blasts on the whistle.
Alter course to port, sounding one short blast on the whistle.
The vessel is sighted directly astern, range 6 miles. What action should the OOW take?
Maintain course and speed and continue to monitor the situation.
Alter course to starboard, sounding two short blasts on the whistle.
Alter course to port, sounding 5 short blasts on the whistle.
Alter course to port, sounding one short blast on the whistle.
On this radar screen in a North Up, relative motion display. Range is set to 6 nm and the vessel is navigating in restricted visibility of less than 500 metres. The vectors shown are relative vectors and set to 12 minutes length. What action may the OOW take?
Make a bold alteration of course to port, large enough to be apparent to a vessel observing by radar, of 180° .
Sound five short and rapid blasts on the ship's whistle.
Make a bold alteration of course to starboard, and sound one short blast.
Maintain course and speed, continuing to monitor the situation.
30° on port bow, distance off determined by radar is 2 miles. Risk of collision or a close quarter situation is developing. What action should the OOW take?
Sound five or more short and rapid blast on the ship's whistle. This may be accompanied by a light signal of five or more short and rapid flashes.
Increase ships speed to maintain course and sound five short and rapid blasts on the ship's whistle.
Maintain course and speed, continuing to monitor the situation.
Bold alteration to port, sounding two short blasts on the ship’s whistle, which may be accompanied by a light signal of two short flashes.
The vessel is sighted dead ahead, distance off is less than 2 miles. Which two actions from the following options may the OOW take?
Alter course to starboard, sounding one short blast on the whistle.
Alter course to port, and sound two short blasts on the whistle.
Sound five or more short and rapid blasts on the ship's whistle.
Maintain course and speed, continuing to monitor the situation.
The vessel is sighted 20° to port, distance off is 2 miles. Risk of collision has been determined to exist. What action may the OOW take?
Maintain course and speed, sounding five or more short and rapid blasts on the ship's whistle.
Maintain course and speed, continuing to monitor the situation.
Alter course to port, sounding two short blasts on the whistle.
Alter course to starboard, sounding one short blast on the whistle.
Sighted 90° on port bow, distance off determined by radar is 2 miles. Risk of collision or a close quarter situation is developing. Which two actions from the following options may the OOW take?
Sound five short and rapid blasts on the ship's whistle.
Maintain course and speed, continuing to monitor the situation.
Bold alteration to starboard, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Bold alteration to starboard, sounding two short blasts on the ship's whistle and may add a light signal of two short flashes.
The following table shows target data displayed on a north up, stabilised ARPA radar for the target echo indicated on the radar screen. The vessel is navigating in restricted visibility of less than 500 metres, own vessel course steered 040° speed 12,0 knots. What action should the OOW take?
Slow down significantly or stop.
Start sounding fog signals.
Make a bold alteration of course to port.
Maintain course and speed, continuing to monitor the situation.
What to the Rules tell OOW to do?
Keep out of the way of the other vessel.
Maintain course and speed, continuing to monitor the situation.
Slow down.
Altcourse to starboard, sounding one short blast on the whistle.
Sighted at long range 80° on the starboard bow, risk of collision or a close quarter situation is developing. What action should the OOW take?
Bold alteration to starboard, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Sound five or more short and rapid blasts on the ship's whistle and maintain course and speed.
Bold alteration to port, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Maintain course and speed, continuing to monitor the situation.
Your vessel is within a TSS. The vessel is sighted 40° abaft the port beam, distance off is less than 2 miles, TCPA 13 minutes. Risk of collision has been determined to exist. What action may the OOW take?
Maintain course and speed, sounding five or more short and rapid blasts on the ship's whistle.
Maintain course and speed, continuing to monitor the situation.
Alter course to port, sounding two short blasts on the whistle.
Alter course to starboard, sounding one short blast on the whistle.
The vessel is sighted 50° abaft the port beam, distance off determined by radar is 3 miles, TCPA 47 minutes. Risk of collision or a close quarter situation is developing. What action should the OOW take?
Maintain course and speed, continuing to monitor the situation.
Alter course to port, sounding two short blasts on the whistle.
Establish if risk of collision exists, and or a close quarter situation is developing.
Alter course to starboard, sounding one short blast on the whistle.
The vessel is sighted dead ahead. What action should the OOW take?
Alter course to starboard, sounding one short blast on the whistle.
Maintain course and speed.
Alter course to starboard, sounding two short blasts on the whistle.
Alter course to port, sounding one short blast on the whistle.
The vessel is sighted right ahead, distance off determined by radar is 3 miles. What action should the OOW take?
Alter course to starboard, sounding one short blast on the whistle.
Alter course to port, and sound one short blast on the whistle.
Maintain course and speed, continuing to monitor the situation.
Sound five or more short and rapid blasts on the ship's whistle.
Your vessel is within a TSS. The vessel is sighted 40° abaft the starboard beam, distance off is less than 1 mile, TCPA 7 minutes. Risk of collision has been determined to exist. There is another power driven vessel directly astern of you following the TSS. What action may the OOW take?
Alter course to port, sounding two short blasts on the whistle.
Maintain course and speed, continuing to monitor the situation.
Maintain course and speed.
Alter course to starboard, sounding one short blast on the whistle.
Your vessel is within a TSS. The vessel is sighted 20° to starboard, distance off is more than 4 miles, TCPA 30 minutes. Risk of collision has been determined to exist. What action may the OOW take?
Maintain course and speed, continuing to monitor the situation.
Alter course to starboard, sounding one short blast on the whistle.
Alter course to port, sounding two short blasts on the whistle.
Maintain course and speed.
Sighted 30° on port bow, distance off determined by radar is 1 mile. Risk of collision or a close quarter situation is developing and the vessel is continuing to get closer. What action should the OOW take?
Bold alteration to starboard, sounding one short blast on the ship's whistle and may add a light signal of one short flash.
Increase ships speed to maintain course and sound five short and rapid blasts on the ship's whistle.
Maintain course and speed, continuing to monitor the situation.
Bold alteration to starboard, sounding two short blasts on the ship's whistle and may add a light signal of two short flashes.
What is the arc of visibility for a masthead light, as described in Rule 21: Definitions?
225º, from right ahead to 22.5º abaft the beam on either side of the vessel.
180º, from right ahead to directly abeam on each side of the vessel.
135º, from dead ahead to 67.5º abaft the beam on the starboard side only.
360º, visible from all directions around the vessel.
What is the arc of visibility for a sidelight, as described in Rule 21: Definitions?
135º, from right ahead to 45º abaft the beam on the respective side of the vessel.
112.5º, from right ahead to 22.5º abaft the beam on the respective side of the vessel.
180º, from directly ahead to directly astern on the respective side of the vessel.
90º, extending from the beam to 45º forward of the beam on the respective side of the vessel.
What is the frequency of a “flashing light”, as defined in Rule 21: Definitions?
60 flashes per minute.
Between 30 and 60 flashes per minute.
Exactly 90 flashes per minute.
120 flashes or more per minute.
Is a power-driven vessel underway, of less than 50 metres in length, obliged to exhibit a second masthead light?
No, but may do so by Rule 23: “Power-driven Vessels Underway”.
Yes, a second masthead light is mandatory for all power-driven vessels underway regardless of length.
No, vessels under 50 metres are prohibited from displaying a second masthead light under any circumstances.
Yes, but only when navigating in restricted visibility or at speeds exceeding 15 knots.
In order for a Wing-in-Ground craft to exhibit a high intensity all-round flashing red light in compliance with the Rules, what must she be doing?
Proceeding at displacement speed while navigating in a traffic separation scheme.
Anchored outside a designated fairway during restricted visibility.
Taking-off, landing and in flight near the surface.
Towing another vessel or floating object in open waters.
When will a power-driven vessel engaged in pushing and a vessel being pushed be considered as simply a “power-driven vessel”?
When the vessel being pushed is unmanned and less than 50 metres in length.
When the pushing operation is conducted only within harbour limits under pilotage.
When the pushing vessel is using two towing lines of equal length and the vessels maintain a fixed distance.
When they are rigidly connected as a composite unit.
What does a vessel under sail exhibit to indicate that it is also being propelled by machinery?
A conical shape, apex down, where it can best be seen.
A black spherical shape displayed at the foremast during daylight hours.
Two black cones with their apexes together, suspended where they can best be seen.
A diamond shape displayed below the masthead to indicate auxiliary propulsion.
What alternative arrangement to sidelights and stern light may be exhibited by a sailing vessel of less than 20 meters in length?
A single all-round white light at the masthead.
A combined lantern.
Two all-round lights in a vertical line, red over green.
A flashing amber light visible through 360°.
What is the arc of visibility of the additional red and green lights exhibited at or near the top of the mast of a sailing vessel?
225°, from right ahead to 22.5° abaft the beam on either side.
112.5°, from right ahead to 22.5° abaft the beam on the respective side.
All round.
135°, covering from right astern to 67.5° before the beam on each side.
How many forward masthead lights must be displayed in a vertical line forward on a power-driven vessel engaged in towing, when the length of the tow, measured from the stern of the towing vessel to the after end of the tow, exceeds 200 meters?
Two.
Four.
One.
Three.
What day signal must be displayed by a power-driven vessel engaged in towing, when the length of the tow exceeds 200 meters?
A diamond shape, where it can best be seen.
Two black balls displayed in a vertical line.
A black cone, apex upwards, where it can best be seen.
No day signal is required provided the towing lights are exhibited correctly.
What day signal must be displayed by a vessel or object being towed (other than an inconspicuous or partly submerged vessel or object or combination of such vessels or objects)?
A diamond shape, where it can best be seen.
A black ball displayed where it can best be seen.
Two cones with their apexes together displayed in a vertical line.
A cylinder shape displayed at the forward end of the towed vessel or object.
What term is applied to a partly submerged flexible container used for transporting liquid cargoes?
Pontoon tank.
Dracone.
Flexible barge.
Inflatable cargo bladder.
What lights are required on an inconspicuous, partly submerged vessel or object of less than 25 meters in breadth, (other than a dracone) being towed?
One masthead light forward and one stern light aft, both visible for 225°.
Two all-round red lights displayed vertically at the forward end and one all-round white light aft.
One all-round white light at or near the forward and one all-round white light at or near the aft end.
A yellow towing light at the forward end and a flashing white light at the aft end.
What is the required minimum range for a masthead light on a vessel of 50 meters or more in length?
3 miles.
5 miles.
10 miles.
6 miles.
What is the required minimum range for a sidelight on a vessel of 50 meters or more in length?
3 miles.
2 miles.
5 miles.
6 miles.
What is the definition of a fishing vessel engaged in trawling?
One which uses fixed nets or fishing lines attached to buoys while remaining stationary.
One which drags a dredge net or other apparatus used as a fishing appliance through the water.
One which collects fish only by means of mechanical lifting devices from the seabed.
One which operates fishing gear that is suspended vertically in the water without being towed.
Which Annex to the Rules lists the “Distress Signals”?
Annex IV.
Annex I.
Annex III.
Annex V.
If whistles are fitted on a vessel at a distance apart of more than 100 meters, how will manoeuvering and warning signals be given?
On both whistles simultaneously.
On one whistle only.
Alternately on the forward and aft whistles.
By using the whistle nearest to the vessel\'s centreline only.
Which Annex to the Rules lists the “Additional Signals for Fishing Vessels Fishing in Close Proximity”?
Annex I.
Annex III.
Annex II.
Annex V.
Which Annex to the Rules lists the “Positioning and Technical Details of Lights and Shapes”?
Annex II.
Annex III.
Annex IV.
Annex I.
Can Traffic Separation Schemes created by a Government or State be adopted by the International Maritime Organization for the purpose of the COLREGs?
Yes.
No, only national maritime authorities may approve and enforce them.
Yes, but only if they are located outside territorial waters.
No, Traffic Separation Schemes are established exclusively by individual shipping companies.
Which of the following is a statement extracted from the International Regulations for Preventing Collisions at Sea?
Nothing in these Rules shall prevent a vessel from disregarding any requirement when operating under the direction of a pilot.
Nothing in these Rules shall exonerate any vessel, or the owner, master or crew thereof, from the consequences of any neglect to comply with these Rules or the neglect of any precaution which may be required by the ordinary practice of seamen, or by the special circumstances of the case.
A vessel may be exempted from complying with these Rules if the master considers another action to be safer.
Every vessel shall be responsible only for the actions of the master and shall not be affected by the negligence of the crew.
How does Rule 3 “Definitions” describe a “Sailing Vessel”?
Any vessel fitted with sails regardless of whether its engine is running.
Any vessel proceeding only by wind power and having no means of mechanical propulsion.
Any vessel under sail provided that propelling machinery, if fitted, is not being used.
Any vessel less than 20 metres in length that is propelled mainly by sails.
How does Rule 3 “Definitions” describe a “Vessel Not Under Command“?
A vessel which is stopped in the water and has no intention of proceeding until repairs are completed.
A vessel which has lost propulsion but is still able to alter course and avoid other vessels.
A vessel which is restricted by weather conditions and is unable to maintain its normal service speed.
A vessel which through some exceptional circumstance is unable to manoeuvre as required by these Rules and is therefore unable to keep out of the way of another vessel.
How does Rule 3 “Definitions” describe a “Vessel Restricted in her Ability to Manoeuvre“?
A vessel which from the nature of her work is restricted in her ability to manoeuvre as required by these Rules and is therefore unable to keep out of the way of another vessel.
A vessel which is temporarily unable to manoeuvre because of engine failure or steering gear breakdown.
A vessel which is anchored or moored and unable to proceed due to its fixed position.
A vessel which is limited in speed only because of adverse weather conditions or heavy seas.
How does Rule 3 “Definitions” describe a “Vessel Constrained by her Draught“?
A vessel which because of her draught in relation to the available depth and width of navigable water is severely restricted in her ability to deviate from the course she is following.
A vessel which has a draught greater than 10 metres and is unable to navigate outside deep-water routes.
A vessel which is carrying a heavy cargo and has reduced stability, limiting her ability to alter course.
A vessel which is restricted in manoeuvring only because of reduced engine power or limited propulsion capability.
How do the COLREGs explain the term “Underway”?
A vessel that is moving through the water using its own means of propulsion only.
A vessel that is not at anchor, or made fast to the shore, or aground.
A vessel that is proceeding at a speed greater than three knots and is capable of altering course.
A vessel that has her engines running and is preparing to leave a berth or anchorage.
How do the COLREGs define “Restricted Visibility”?
Any condition during nighttime when the visibility of navigation lights is reduced.
Any situation where a vessel cannot be seen visually beyond a distance of 2 nautical miles.
Any condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sandstorms or any other similar causes.
Any condition where strong winds or rough seas prevent a vessel from maintaining her normal course.
How should a vessel maintain a look-out, as identified in Rule 5: “Look-out”?
By sight only, using visual observation from the bridge and avoiding reliance on electronic navigation equipment.
By radar observation and automatic tracking systems only, especially during periods of restricted visibility.
By maintaining communication with nearby vessels and relying on their navigation intentions to assess collision risk.
By sight and hearing as well as by all available means appropriate in the prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision.
What is the “safe distance” around a vessel engaged in mine clearance operations as defined by the Rules?
1 000 metres.
500 metres.
2 000 metres.
3 nautical miles.
When in open waters and in sight of one another, what whistle signal should a power-driven vessel underway make to indicate that she is altering her course to starboard?
Two short blasts.
One short blast.
One prolonged blast followed by one short blast.
Three short blasts.
What is the fog signal for a vessel aground, 150 meters in length?
At not more than 2 minute intervals: one prolonged blast followed by three short blasts on the whistle and rapid ringing of the bell.
At not more than 1 minute intervals: continuous ringing of the bell for about 5 seconds only at the forward end of the vessel.
At not more than 1 minute intervals: 3 strokes on bell forward, rapid ringing of the bell for about 5 seconds, 3 strokes on the bell, sounding gong aft for about 5 seconds.
At not more than 1 minute intervals: continuous ringing of the bell for about 5 seconds only at the forward end of the vessel.
What is the duration of a “prolonged” blast as defined in the COLREGs?
1-2 seconds.
2-4 seconds.
6-10 seconds.
4-6 seconds.
When in open waters and in sight of one another, what whistle signal should a power-driven vessel underway make to indicate that she is altering her course to port?
Two short blasts.
One short blast.
Three short blasts.
One prolonged blast followed by two short blasts.
What is the fog signal of a vessel “Restricted in her Ability to Manoeuvre”?
At not more than 2 minute intervals, two prolonged blasts followed by one short blast.
At not more than 2 minute intervals, one prolonged blast, followed by two short blasts.
At not more than 1 minute intervals, one prolonged blast followed by three short blasts.
At not more than 2 minute intervals, three short blasts only.
When a power-driven vessel is stopped and making no way through the water, what would her fog signal be?
At not more than 2 minute intervals, one prolonged blast followed by one short blast.
At not more than 1 minute intervals, three prolonged blasts with about 2 seconds between each blast.
At not more than 2 minute intervals, two prolonged blasts, with about 2 seconds between them.
At not more than 2 minute intervals, one short blast followed by two prolonged blasts.
Under which of the following circumstances would you consider yourself an overtaking vessel?
When approaching another vessel from a direction within 22,5 degrees on either side of her bow and being able to see both sidelights.
When approaching another vessel from any direction where both vessels are on reciprocal or nearly reciprocal courses.
When passing another vessel from abeam or forward of her beam, regardless of the relative aspect and lights observed.
When coming up with another vessel from a direction of more than 22,5 degrees abaft her beam, that is, in such a position with reference to the vessel she is overtaking, that at night she would be able to see only the sternlight of that vessel but neither of her sidelights.
What additional identification signal may be sounded by a pilot vessel “engaged in pilotage duty”?
Four short blasts.
One prolonged blast followed by three short blasts.
Two prolonged blasts followed by two short blasts.
Five short blasts.
How do the Regulations say a vessel should proceed in terms of “speed”?
Every vessel shall at all times proceed at a safe speed so that she can take proper and effective action to avoid collision and be stopped within a distance appropriate to the prevailing circumstances and conditions.
Every vessel shall maintain the maximum economical speed unless another vessel is detected within visual range.
Every vessel shall proceed at a speed sufficient to maintain her scheduled voyage, reducing speed only in restricted visibility.
Every vessel shall keep a constant speed whenever possible to ensure that her intentions can be readily determined by other vessels.
You are in open water in clear visibility and you meet a vessel on a reciprocal course. What action would you reasonably expect the other vessel to take?
To maintain her present course and speed until your vessel alters course first.
To alter her course to starboard in compliance with Rule 14.
To alter her course to port so as to pass port-to-port as quickly as possible.
To reduce speed and stop engines while waiting for your vessel to take avoiding action.
How should you normally join a traffic separation scheme?
By entering the traffic lane at a right angle regardless of the direction of traffic flow.
By joining the nearest separation zone first and then proceeding into the traffic lane when convenient.
At the termination of the lane, but when joining or leaving from either side shall do so at as small an angle to the general direction of traffic flow as practicable.
By entering the traffic lane at any convenient point, provided a constant speed is maintained.
What is the fog signal of a vessel “Constrained by her Draught”?
At not more than 2 minute intervals, two prolonged blasts followed by one short blast.
At not more than 1 minute intervals, one prolonged blast only.
At not more than 2 minute intervals, one short blast followed by one prolonged blast and one short blast.
At not more than 2 minute intervals, one prolonged blast, followed by two short blasts.
What whistle signal would you use to indicate to another vessel in sight that you had put your engines astern?
Three short blasts.
One prolonged blast followed by one short blast.
Two short blasts.
One prolonged blast followed by three short blasts.
A vessel is permitted to engage in fishing within a traffic lane but what obligations does that vessel have to other vessels proceeding within that traffic lane?
The fishing vessel has priority over all power-driven vessels but must keep clear of vessels constrained by their draught.
The fishing vessel shall not impede the passage of any vessel following a vessel engagedtraffic lane.
The fishing vessel shall suspend fishing operations whenever a power-driven vessel approaches within 2 nautical miles.
The fishing vessel may continue fishing without restriction, provided she maintains a listening watch on VHF Channel 16.
Other than a vessel en route to or from a port, installation, structure or pilot station within an inshore traffic zone or for the purposes of avoiding immediate danger, what length of vessel is permitted to use an inshore traffic zone, even if adjacent to a traffic separation scheme?
Less than 12 metres.
Less than 50 metres.
Less than 20 metres.
Less than 100 metres.
What whistle signal can a vessel proceeding along a narrow, inland channel and approaching a bend around a high bluff or headland use to indicate its presence to another vessel which may be out of sight around that bend?
Two prolonged blasts.
One prolonged blast followed by one short blast.
Three short blasts.
One prolonged blast.
At what distance must outlying gear extend from a fishing vessel for it to be obliged to display an all-round white light or a cone apex upwards in the direction of the gear?
150 metres.
100 metres.
200 metres.
250 metres.
In terms of “Risk of Collision”, what do the Rules say about “scanty radar information”?
Scanty radar information may be used as the primary basis for collision avoidance if visual observations are unavailable.
Radar information alone is sufficient to determine that no risk of collision exists, provided the target remains steady.
When radar information is scanty, vessels should maintain course and speed until additional radar targets are detected.
Assumptions shall not be made on the basis of scanty information, especially scanty radar information.
How do the Rules describe “any action to avoid collision”?
Any action to avoid collision should be limited to reducing speed unless communication has first been established with the other vessel.
Any action to avoid collision shall be taken in accordance with the Rules of this Part and shall, if the circumstances of the case admit, be positive, made in ample time and with due regard to the observance of good seamanship.
Any action to avoid collision may be delayed until the intentions of the other vessel have been confirmed by VHF radio.
Any action to avoid collision shall consist primarily of altering course to port whenever sea room permits.
How do the Rules describe “any alteration of course and/or speed to avoid collision”?
Any alteration of course and/or speed to avoid collision shall, if the circumstances of the case admit, be large enough to be readily apparent to another vessel observing visually or by radar; a succession of small alterations of course and/or speed should be avoided.
Any alteration of course and/or speed to avoid collision should be made in a series of small adjustments to avoid confusing other vessels.
Any alteration of course to avoid collision should always be accompanied by a reduction in speed, regardless of the circumstances.
Any alteration of course and/or speed should only be made after sound signals have been exchanged and acknowledged by the other vessel.
What does Rule 8 “Action to Avoid Collision” recommend as potentially the most effective action to avoid a close-quarters situation?
A reduction of speed alone is always the preferred action, regardless of the relative bearing of the other vessel.
Alteration of course alone, provided that it is made in good time, is substantial and does not result in another close-quarters situation.
A succession of small alterations of course is recommended so that the other vessel can better assess your intentions.
Altering course to port is generally the most effective action, provided it is accompanied by sound signals.
How effective must any action taken to avoid collision be, according to Rule 8 “Action to Avoid Collision”?
Such as to ensure that the vessel maintains her original speed throughout the manoeuvre.
Such as to result in the other vessel altering course instead of your own vessel.
Such as to result in passing at a safe distance.
Such as to keep the vessels within visual range until they have safely passed each other.
According to Rule 8 “Action to Avoid Collision”, what action should you take if you need more time to assess a developing close-quarters situation?
Maintain your present speed and alter course in small increments until the situation becomes clear.
Increase speed to pass the other vessel as quickly as possible and minimize the close-quarters situation.
Sound the danger signal and continue on your original course until the other vessel takes avoiding action.
Slacken your speed or take all way off by stopping or reversing your means of propulsion.
In which part of a narrow channel or fairway is a vessel to proceed?
As near to the outer limit of the channel or fairway which lies on her starboard side as is safe and practicable.
In the center of the channel whenever depth permits, regardless of the direction of traffic.
As close as practicable to the port side of the channel to allow overtaking vessels to pass on the starboard side.
Along any part of the channel that provides the shortest route, provided safe speed is maintained.
When two sailing vessels are approaching on another, so as to involve risk of collision and each has the wind on a different side, which one is obliged to keep out of the way?
The vessel which has the wind on the starboard side.
The vessel which has the wind on the port side.
The vessel sailing closer to the wind, regardless of which side the wind is on.
The larger of the two vessels, irrespective of the tack on which she is sailing.
When a vessel is in doubt as to whether she is overtaking another vessel, what must she do according to the COLREGs?
She shall maintain her present course and speed until the other vessel indicates her intentions by whistle signals.
She shall assume that she is the stand-on vessel and continue on her original course unless risk of collision becomes imminent.
She shall assume that this is the case and act accordingly.
She shall alter course to starboard immediately to ensure a safe passing distance, regardless of the circumstances.
How do the Collision Regulations say that a “head-on situation” can be recognized?
Only the green sidelight of the other vessel is visible at night and her bearing remains constant.
The sternlight and one sidelight of the other vessel are visible, indicating that she is proceeding on a reciprocal course.
The other vessel is detected ahead by radar at a range of less than 6 nautical miles, regardless of her aspect.
The masthead lights of the other vessel would be in a line or nearly in a line and/or both sidelights can be seen and by day the corresponding aspect of the other vessel.
According to Rule 15 “Crossing Situation”, which vessel shall keep out of the way?
The vessel which has the other on her own starboard side.
The vessel which has the other on her own port side.
The vessel which is proceeding at the higher speed, regardless of the relative bearing.
The vessel which is closest to the point where the two courses will intersect.
According to Rule 16 “Action by Give-way Vessel” in what way must a vessel take action to keep out of the way?
She shall maintain her course and speed until the risk of collision becomes immediate, then take avoiding action.
She shall make only a small alteration of course to avoid unnecessarily disturbing the navigation of the stand-on vessel.
She shall, so far as possible, take early and substantial action to keep well clear.
She shall reduce speed first and only alter course if the other vessel fails to take action.
According to Rule 17, what may a stand-on vessel do, once it becomes apparent to her that a vessel required to keep out of the way is not taking appropriate action in compliance with the Rules?
She may take action to avoid collision by her manoeuvre alone.
She must immediately stop her engines and remain stationary until the give-way vessel takes action.
She must always alter her course to port to pass ahead of the other vessel.
She is not permitted to take any action unless the give-way vessel signals her intentions by sound signals.
According to Rule 17, if a stand-on vessel finds herself so close that collision cannot be avoided by the action of the give-way vessel on its own, what must that stand-on vessel do?
She shall maintain her course and speed until the give-way vessel has completely stopped.
She shall immediately alter course to port and reduce speed to half ahead.
She shall take such action as will best aid to avoid collision.
She shall sound five short and rapid blasts and continue on her original course.
According to Rule 18 “Responsibilities between Vessels”, how should a “Vessel Constrained by her Draught” navigate?
With unrestricted manoeuvrability and maintaining maximum speed to reduce the risk of collision.
By always keeping out of the way of all other vessels regardless of the circumstances.
By stopping her engines whenever another vessel is approaching within sight.
With particular caution having full regard to her special condition.
According to Rule 20, when must the Rules referring to lights be complied with?
Only from midnight until sunrise when vessels are engaged in navigation.
From sunset to sunrise, and during such times from sunrise to sunset when restricted visibility exists.
From sunrise to sunset in all weather conditions, regardless of visibility.
Only when two or more vessels are in sight of one another at night.
What colour is a towing light?
Red.
Yellow.
White.
Green.
Assuming it is deemed necessary to your passage plan, how should you plan to cross a traffic separation scheme?
At as small an angle as practicable to the general direction of traffic flow.
Track 2.
Track 1.
Track 3.
Identify the vessel.
Vessel constrained by her draught, restricted in her ability to manoeuvre.
Power-driven vessel engaged in fishing, showing appropriate lights.
Sailing vessel underway, less than 20 metres in length.
Power-driven vessel underway, less than 50 metres in length.
Identify the vessel.
Power-driven vessel underway, less than 50 metres in length and showing one masthead light.
Air-cushioned vessel operating in the non-displacement mode, less than 50 metres in length.
Vessel engaged in towing, showing two masthead lights in a vertical line.
Vessel constrained by her draught, showing three all-round red lights in a vertical line.
Identify the vessel.
Power-driven vessel underway, less than 50 metres in length, showing only one masthead light and one sternlight.
Vessel engaged in pilotage duty, showing an all-round white light over an all-round red light.
Air-cushioned vessel operating in the non-displacement mode, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, underway.
Wing-in-ground (WIG) craft operating in flight mode, showing navigation lights of a sailing vessel.
Identify the vessel(s)(select all possible answers).
Power-driven vessel engaged in towing, less than 50 metres in length, length of tow under 200 metres, towing vessel and tow restricted in their ability to deviate from their course.
Power-driven vessel underway, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, restricted in her ability to manoeuvre.
Vessel engaged in towing, showing two masthead lights and two all-round red lights in a vertical line.
Vessel constrained by her draught, showing three all-round red lights in a vertical line.
Identify the vessel(s)(select all possible answers).
Power-driven vessel engaged in towing, length of tow less than 200 metres, showing two masthead lights in a vertical line.
Vessel restricted in her ability to manoeuvre, showing two all-round red lights and two all-round white lights in a vertical line.
Power-driven vessel engaged in towing, less than 50 metres in length, length of tow exceeds 200 metres, towing vessel and tow restricted in their ability to deviate from their course.
Power-driven vessel engaged in towing, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, length of tow under 200 metres, towing vessel and tow restricted in their ability to deviate from their course.
Identify the vessels.
Power-driven vessel engaged in towing, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light and tow, where length of tow exceeds 200 metres, towing vessel and tow restricted in their ability to deviate from their course.
Power-driven vessel engaged in towing, less than 50 metres in length with tow less than 200 metres, showing two masthead lights in a vertical line.
Vessel restricted in her ability to manoeuvre, showing two all-round red lights over two all-round white lights.
Vessel constrained by her draught, showing three all-round red lights in a vertical line.
Identify the vessel.
Air-cushioned vessel operating in the non-displacement mode, less than 50 metres in length.
Power-driven vessel underway, less than 50 metres in length, showing one masthead light.
Sailing vessel underway, less than 50 metres in length, showing sidelights and sternlight.
Wing-in-Ground (WIG) craft, less than 50 metres in length, taking off, landing or in flight near the surface.
Identify the vessel.
Wing-in-Ground Vessel, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, taking-off, landing or in flight near the surface.
Air-cushioned vessel operating in the non-displacement mode, more than 50 metres in length and underway.
Power-driven vessel underway, more than 50 metres in length, showing two masthead lights and a sternlight.
Vessel engaged in towing, with a tow exceeding 200 metres, showing three masthead lights in a vertical line.
Identify the vessel(s).
Power-driven towing vessel with a tow exceeding 200 metres, showing three masthead lights in a vertical line and two towing lights.
Vessel restricted in her ability to manoeuvre, showing two all-round red lights over two all-round white lights.
Vessel engaged in towing, less than 50 metres in length, showing only one masthead light and no towing light.
Power-driven vessel engaged in towing, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light and tow, where length of tow under 200 metres, not restricted in their ability to deviate from their course.
Identify the vessel(s) (select all applicable answers).
Power-driven vessel engaged in towing, showing two masthead lights in a vertical line and a towing light above the sternlight, with the tow extending less than 200 metres.
Power-driven vessel, length unknown, engaged in towing a dracone, less than 25 metres in breadth, towing vessel and tow restricted in their ability to deviate from their course.
Vessel engaged in fishing, showing two all-round lights in a vertical line and unable to manoeuvre due to fishing gear.
Power-driven vessel not under command, showing two all-round red lights in a vertical line and sidelights.
Identify the vessel(s).
Power-driven vessel engaged in towing with tow less than 200 metres, showing two masthead lights in a vertical line and one towing light.
Vessel not under command, showing two all-round red lights in a vertical line and two sidelights.
Vessel constrained by her draught, showing three all-round red lights in a vertical line and a sternlight.
Power-driven vessel, length unknown, engaged in towing where length of tow exceeds 200 metres, towing vessel and tow restricted in their ability to deviate from their course.
Identify the vessel(s).
Power-driven vessel engaged in towing astern, showing three masthead lights in a vertical line and a yellow towing light, with the tow exceeding 200 metres.
Vessel not under command, showing two all-round red lights in a vertical line and sidelights.
Power-driven vessel, engaged in towing alongside, length unknown and vessel being towed, length of tow unknown, towing vessel and tow restricted in their ability to deviate from their course.
Vessel restricted in her ability to manoeuvre, showing one all-round red light and one all-round white light in a vertical line.
Identify the vessel(s).
Power-driven vessel engaged in towing alongside, length unknown and vessel being towed, length of tow unknown, towing vessel and tow restricted in their ability to deviate from their course.
Power-driven vessel engaged in towing astern, showing three masthead lights in a vertical line and two towing lights, with the tow exceeding 200 metres.
Vessel not under command, showing two all-round red lights in a vertical line and two all-round white lights.
Vessel engaged in fishing, showing red over white all-round lights and making way through the water.
Identify the vessels.
Vessels engaged in fishing other than trawling, showing red over white all-round lights and making way through the water.
Vessels engaged in fishing (pair-trawling), more than 20 metres but less than 50 metres in length, or less than 20 metres in length and showing the additional signals voluntarily, making way through the water, hauling nets.
Power-driven vessels engaged in towing, showing two masthead lights in a vertical line and a yellow towing light.
Vessels restricted in their ability to manoeuvre, showing two all-round red lights over two all-round white lights.
Identify the vessel.
Vessel engaged in trawling, showing green over white all-round lights and making way through the water.
Vessel restricted in her ability to manoeuvre, showing red over white over red all-round lights.
Vessel engaged in fishing other than trawling, length unknown, making way through the water, where there is outlying gear extending more than 150 metres horizontally in the direction of the additional all-round white light.
Power-driven vessel engaged in towing, showing two masthead lights in a vertical line and a yellow towing light.
Identify the vessel.
Power-driven vessel underway, showing one masthead light, sidelights and sternlight.
Vessel engaged in fishing, showing red over white all-round lights and sidelights.
Vessel not under command, showing two all-round red lights in a vertical line.
Sailing vessel underway, showing sidelights and sternlight.
Identify the vessel.
Sailing vessel underway.
Power-driven vessel underway, showing two masthead lights and a sternlight.
Vessel engaged in trawling, showing green over white all-round lights and sidelights.
Vessel restricted in her ability to manoeuvre, showing two all-round red lights over two all-round white lights.
How far does the gear extend horizontally from this fishing vessel?
Less than 50 metres.
More than 150 metres.
Between 50 and 100 metres.
Exactly 100 metres.
Identify the vessel.
Power-driven vessel underway, showing masthead light, sidelights and sternlight.
Vessel engaged in fishing other than trawling, showing red over white all-round lights.
Sailing vessel underway, showing sidelights and sternlight.
Vessel not under command, showing two all-round red lights in a vertical line.
Identify the vessel.
Power-driven vessel underway, less than 20 metres in length, showing one masthead light and sidelights.
Sailing vessel underway, more than 50 metres in length, showing two masthead lights and a sternlight.
Vessel engaged in fishing, less than 20 metres in length, showing green over white all-round lights.
Sailing vessel underway, less than 20 metres in length, showing combined lantern at or near the top of the mast.
Identify the vessel.
Sailing vessel underway.
Power-driven vessel underway, showing masthead light, sidelights and sternlight.
Vessel engaged in fishing other than trawling, showing red over white all-round lights.
Vessel restricted in her ability to manoeuvre, showing two all-round red lights over two all-round white lights.
Identify the vessel.
Vessel engaged in trawling, showing two all-round lights in a vertical line (green over white), and making way through the water.
Vessel engaged in fishing with purse seine gear, length unknown, making way through the water and hampered by its gear.
Vessel restricted in her ability to manoeuvre, showing two all-round red lights over two all-round white lights.
Vessel engaged in towing, showing two masthead lights in a vertical line and a yellow towing light.
Identify the vessel.
Vessel engaged in trawling, showing two all-round lights in a vertical line (green over white) and making way through the water.
Vessel restricted in her ability to manoeuvre, showing two all-round white lights over two all-round red lights.
Vessel engaged in fishing with purse seine gear, length unknown, making way through the water and hampered by its gear.
Power-driven vessel engaged in towing, showing two masthead lights in a vertical line and a yellow towing light.
Identify the vessel.
Vessel restricted in her ability to manoeuvre, making way through the water, showing red over white over red all-round lights.
Power-driven vessel underway, showing masthead light, sidelights and sternlight.
Vessel engaged in fishing, showing red over white all-round lights and additional fishing signals.
Vessel not under command, length unknown, making way through the water.
Identify the vessel.
Vessel not under command, length unknown, not making way through the water.
Vessel engaged in fishing, not making way through the water, showing green over white all-round lights.
Power-driven vessel underway, stopped in the water, showing two masthead lights and sidelights.
Vessel restricted in her ability to manoeuvre, not making way through the water, showing red-white-red all-round lights in a vertical line.
Identify the vessel.
Vessel restricted in her ability to manoeuvre, showing three all-round lights in a vertical line (red-white-red).
Vessel not under command.
Vessel engaged in fishing, showing two all-round lights in a vertical line (red over white).
Power-driven vessel underway, showing two masthead lights, sidelights and sternlight.
Identify the vessel.
Vessel not under command, not making way through the water, showing only two all-round red lights in a vertical line.
Vessel restricted in her ability to manoeuvre, making way through the water, showing red-white-red all-round lights and sidelights.
Vessel not under command, making way through the water.
Power-driven vessel underway, showing one masthead light, sidelights and sternlight.
Identify the vessel.
Power-driven vessel underway, more than 50 metres in length, or less than 50 metres in length and showing the a second masthead light.
Power-driven vessel underway, less than 50 metres in length and showing only one masthead light.
Vessel engaged in towing with a length of tow exceeding 200 metres.
Vessel not under command, showing two all-round red lights in a vertical line.
Identify the vessel(s)(select all possible answers).
Vessel not under command, length unknown, making way through the water, stern on.
Vessel aground, head-on.
Vessel engaged in towing another vessel.
Vessel aground, stern-on.
Identify the vessel.
Vessel engaged in fishing, less than 50 metres in length, making way through the water.
Pilot vessel engaged on pilotage duty, less than 50 metres in length, making way through the water.
Vessel restricted in her ability to manoeuvre (other than a vessel engaged in mine clearance operations), less than 50 metres in length, making way through the water.
Power-driven vessel, less than 50 metres in length, underway.
Identify the vessel.
Vessel constrained by her draught, more than 50 metres in length, making way through the water.
Towing vessel with a tow exceeding 200 metres in length, making way through the water.
Vessel engaged in trawling, more than 50 metres in length, making way through the water.
Vessel restricted in her ability to manoeuvre, (other than a vessel engaged in mine clearance operations), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, making way through the water.
Identify the vessel(s) (select all possible answers).
Power-driven vessel underway, more than 50 metres in length, or less than 50 metres in length and showing the a second masthead light.
Vessel restricted in her ability to manoeuvre, more than 50 metres in length, making way through the water.
Vessel engaged in towing, less than 50 metres in length, length of tow over 200 metres in length.
Vessel engaged in towing with a tow exceeding 200 metres in length.
Identify the vessel.
Power-driven vessel underway, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light.
Vessel constrained by her draught, making way through the water.
Vessel restricted in her ability to manoeuvre (other than a vessel engaged in mine clearance operations), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, making way through the water.
Vessel engaged in fishing with trawl gear, more than 50 metres in length, making way through the water.
Identify the vessel.
Vessel engaged in fishing, length unknown.
Vessel engaged in trawling, length unknown.
Vessel restricted in her ability to manoeuvre, length unknown.
Power-driven vessel underway, length unknown.
Identify the vessel.
Vessel engaged in fishing (other than trawling), less than 50 metres in length, not making way through the water.
Power-driven vessel, less than 50 metres in length, underway.
Vessel engaged in fishing (trawling), less than 50 metres in length, not making way through the water.
Vessel restricted in her ability to manoeuvre, less than 50 metres in length, not making way through the water.
Identify the vessel.
Vessel engaged in fishing (trawling), less than 50 metres in length, making way through the water.
Power-driven vessel, less than 50 metres in length, making way through the water.
Vessel restricted in her ability to manoeuvre, less than 50 metres in length, making way through the water.
Vessel engaged in fishing other than trawling, less than 50 metres in length, making way through the water.
Identify the vessel.
Vessel engaged in fishing (trawling), length unknown, making way through the water.
Vessel engaged in fishing other than trawling, length unknown, making way through the water.
Power-driven vessel, length unknown, making way through the water.
Vessel restricted in her ability to manoeuvre, length unknown, making way through the water.
Identify the vessel.
Vessel engaged in fishing other than trawling, more than 50 metres in length, making way through the water.
Vessel engaged in fishing (trawling), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, making way through the water.
Power-driven vessel, more than 50 metres in length, making way through the water.
Vessel restricted in her ability to manoeuvre, more than 50 metres in length, making way through the water.
Identify the vessel.
Vessel engaged in fishing other than trawling, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, making way through the water.
Vessel constrained by her draught, more than 50 metres in length, making way through the water.
Vessel engaged in fishing (trawling), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, making way through the water.
Towing vessel with a tow exceeding 200 metres in length, making way through the water.
Identify the vessel.
Vessel engaged in fishing other than trawling, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, not making way through the water.
Power-driven vessel, more than 50 metres in length, underway.
Vessel restricted in her ability to manoeuvre, more than 50 metres in length, not making way through the water.
Vessel engaged in fishing (trawling), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, not making way through the water.
Identify the vessel.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, or less than 20 metres in length and showing the additional signals voluntarily, making way through the water, shooting nets.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, making way through the water, hauling nets.
Vessel engaged in fishing other than trawling, more than 20 metres but less than 50 metres in length, making way through the water, shooting gear.
Vessel restricted in her ability to manoeuvre, more than 20 metres but less than 50 metres in length, making way through the water.
Identify the vessel.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, making way through the water, hauling nets.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, not making way through the water.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, or less than 20 metres in length and showing the additional signals voluntarily, making way through the water, shooting nets.
Vessel engaged in fishing other than trawling, more than 20 metres but less than 50 metres in length, making way through the water.
Identify the vessel.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, or less than 20 metres in length and showing the additional signals voluntarily, making way through the water, shooting nets.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, making way through the water, hauling nets.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, making way through the water, recovering nets.
Vessel engaged in fishing other than trawling, more than 20 metres but less than 50 metres in length, making way through the water.
Identify the vessel.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, making way through the water, shooting nets.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, making way through the water, recovering nets.
Vessel engaged in fishing other than trawling, more than 20 metres but less than 50 metres in length, making way through the water.
Vessel engaged in fishing (trawling), more than 20 metres but less than 50 metres in length, or less than 20 metres in length and showing the additional signals voluntarily, making way through the water, hauling nets.
Identify the vessel.
Vessel engaged in fishing (trawling), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, or less than 20 metres in length and also showing the additional signals voluntarily, making way through the water, hauling nets.
Vessel engaged in fishing (trawling), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, making way through the water, shooting nets.
Vessel engaged in fishing other than trawling, more than 50 metres in length, making way through the water, hauling gear.
Vessel restricted in her ability to manoeuvre, more than 50 metres in length, making way through the water.
Identify the vessel.
Vessel engaged in fishing (trawling), more than 20 metres in length, making way through the water, hauling nets.
Vessel engaged in fishing (trawling), more than 20 metres in length, or less than 20 metres in length and showing the additional signals voluntarily, not making way through the water, nets fast on an obstruction.
Vessel engaged in fishing other than trawling, more than 20 metres in length, not making way through the water, gear extended.
Vessel restricted in her ability to manoeuvre, not making way through the water.
Identify the vessel.
Vessel engaged in fishing (trawling), more than 50 metres in length, making way through the water, hauling nets.
Vessel engaged in fishing other than trawling, more than 50 metres in length, not making way through the water.
Vessel engaged in fishing (trawling), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, or less than 20 metres in length and also showing the additional signals voluntarily, not making way through the water, nets fast on an obstruction.
Vessel restricted in her ability to manoeuvre, more than 50 metres in length, not making way through the water.
Identify the vessel.
Vessel engaged in fishing (trawling), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, making way through the water, nets being shot.
Vessel engaged in fishing other than trawling, more than 50 metres in length, not making way through the water, nets fast on an obstruction.
Vessel restricted in her ability to manoeuvre, more than 50 metres in length, not making way through the water, unable to manoeuvre freely.
Vessel engaged in fishing (trawling), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, or less than 20 metres in length and also showing the additional signals voluntarily, not making way through the water, nets fast on an obstruction.
Identify the vessels.
Vessels engaged in fishing (pair-trawling), more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, or less than 20 metres in length and also showing the additional signals voluntarily, making way through the water.
Vessels engaged in towing, more than 50 metres in length, making way through the water.
Vessels engaged in fishing other than trawling, operating independently, making way through the water.
Vessels restricted in their ability to manoeuvre, more than 50 metres in length, making way through the water.
Identify the vessel.
Vessel not under command, length unknown, at anchor.
. Vessel restricted in her ability to manoeuvre (other than a vessel engaged in mine clearance operations), length unknown, at anchor.
Vessel constrained by her draught, length unknown, at anchor.
Power-driven vessel, length unknown, at anchor.
Identify the vessel.
Vessel engaged in fishing, length unknown, at anchor.
Vessel not under command, length unknown, at anchor.
Vessel restricted in her ability to manoeuvre (other than a vessel engaged in mine clearance operations), length unknown, at anchor.
Vessel aground, length unknown, at anchor.
Identify the vessel.
Vessel constrained by her draught, more than 50 metres in length, or less than 50 metres in length and showing anchor lights, at anchor.
Power-driven vessel, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light, at anchor.
Vessel engaged in towing, more than 50 metres in length, with the tow secured, at anchor.
Vessel restricted in her ability to manoeuvre (other than a vessel engaged in mine clearance operations), more than 50 metres in length, or less than 50 metres in length and opting to show the lights for and aft, at anchor.
Identify the vessel.
Vessel restricted in her ability to manoeuvre (other than a vessel engaged in mine clearance operations), length unknown, at anchor.
Vessel constrained by her draught, length unknown, at anchor.
Vessel not under command, length unknown, at anchor.
Vessel engaged in fishing, length unknown, at anchor.
Identify the vessel.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, making way through the water, length unknown, obstruction to her port side.
Vessel engaged in dredging or underwater operations, not under command, making way through the water, obstruction to her port side.
Vessel restricted in her ability to manoeuvre, making way through the water, obstruction to her starboard side.
Vessel constrained by her draught, making way through the water, obstruction to her port side.
Identify the vessel.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, making way through the water, length unknown, obstruction to her port side.
Vessel not under command, making way through the water, length unknown, obstruction to her starboard side.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, making way through the water, length unknown, obstruction to her starboard side.
Vessel constrained by her draught, making way through the water, length unknown, obstruction to her starboard side.
Identify the vessel(s).
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, making way through the water, less than 50 metres in length, obstruction to her starboard side.
Vessel restricted in her ability to manoeuvre, less than 50 metres in length, making way through the water, obstruction to her port side.
Vessel engaged in mine clearance operations, less than 50 metres in length, making way through the water, obstruction to her port side.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, making way through the water, less than 50 metres in length, obstruction to her port side.
Identify the vessel.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, making way through the water, more than 50 metres in length, or less than 50 metres in length and showing the a second masthead light, obstruction to her starboard side.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, making way through the water, more than 50 metres in length, or less than 50 metres in length and showing the second masthead light, obstruction to her port side.
Vessel constrained by her draught, more than 50 metres in length, making way through the water, obstruction to her starboard side.
Vessel not under command, more than 50 metres in length, making way through the water, obstruction to her starboard side.
Identify the vessel(s)(select all applicable answers).
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, length unknown, not making way, obstruction to the left side as observed.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, length unknown, at anchor, obstruction to the right side as observed.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, length unknown, at anchor, obstruction to the left side as observed.
Vessel not under command, length unknown, at anchor, obstruction to the left side as observed.
Identify the vessel.
Vessel engaged in mine clearance operations.
Vessel restricted in her ability to manoeuvre due to dredging operations.
Vessel not under command, unable to manoeuvre.
Vessel engaged in diving operations.
Identify the vessel.
Vessel engaged in diving operations, underway.
Vessel engaged in mine clearance operations, underway.
Vessel restricted in her ability to manoeuvre due to underwater operations, underway.
Vessel not under command, underway.
Identify the vessel.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre.
Vessel engaged in fishing operations, unable to manoeuvre freely.
Vessel engaged in mine clearance operations.
Vessel constrained by her draught, restricted in her ability to manoeuvre.
Identify the vessel.
Vessel engaged in mine clearance operations, underway, less than 50 metres in length.
Vessel engaged in mine clearance operations, underway, more than 50 metres in length.
Vessel engaged in fishing operations, underway, less than 50 metres in length.
Vessel engaged in dredging operations, underway, less than 50 metres in length.
At what minimum safe distance should you pass this vessel?
500 metres.
1 000 metres.
750 metres.
1 500 metres.
What do the two red lights on this vessel indicate?
That the vessel is engaged in towing operations.
That the vessel is not under command.
That an obstruction exists on this side of the vessel.
That the vessel is restricted in her ability to manoeuvre.
Identify the vessel.
Vessel restricted in her ability to manoeuvre, underway, more than 50 metres in length, and showing three masthead lights.
Vessel engaged in mine clearance operations, underway, less than 50 metres in length, and showing only one masthead light.
Vessel engaged in dredging or underwater operations, underway, more than 50 metres in length, and showing two masthead lights.
Vessel engaged in mine clearance operations, underway, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light.
Identify the vessel.
Vessel constrained by her draught, underway, less than 50 metres in length, and showing only one masthead light.
Vessel constrained by her draught, underway, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light.
Vessel not under command, underway, more than 50 metres in length, and showing a second masthead light.
Vessel restricted in her ability to manoeuvre, underway, more than 50 metres in length, and showing two masthead lights.
Identify the vessel.
Constrained by her draught, underway, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light.
Vessel constrained by her draught, underway, less than 50 metres in length, and showing only one masthead light.
Vessel not under command, underway, more than 50 metres in length, and showing a second masthead light.
Vessel restricted in her ability to manoeuvre, underway, more than 50 metres in length, and showing two masthead lights.
Identify the vessel.
Vessel constrained by her draught, underway, less than 50 metres in length, and showing only one masthead light.
Vessel constrained by her draught, underway, more than 50 metres in length, and showing three masthead lights.
Vessel constrained by her draught, underway, more than 50 metres in length, or less than 50 metres in length and showing a second masthead light.
Vessel restricted in her ability to manoeuvre, underway, more than 50 metres in length, and showing two masthead lights.
Identify the vessel.
Vessel not under command, underway.
Vessel restricted in her ability to manoeuvre, underway.
Vessel engaged in fishing operations, underway.
Vessel constrained by her draught, underway.
Identify the vessel.
Vessel engaged in pilotage duty, underway.
Vessel engaged in pilotage duty, at anchor.
Vessel not under command, underway.
Vessel constrained by her draught, underway.
What additional whistle signal might this vessel sound to aid identification in conditions of restricted visibility?
Two prolonged blasts followed by one short blast.
One prolonged blast followed by two short blasts.
Four short blasts.
Three short blasts.
Identify the vessel.
Vessel engaged in pilotage duty, at anchor.
Vessel not under command, underway.
Vessel constrained by her draught, underway.
Vessel engaged in pilotage duty, underway.
Identify the vessel.
Vessel engaged in pilotage duty, at anchor, exhibiting identification signal.
Vessel engaged in pilotage duty, underway, exhibiting identification signal.
Vessel engaged in fishing operations, at anchor, exhibiting identification signal.
Vessel not under command, at anchor, exhibiting identification signal.
Identify the vessel.
Vessel not under command, not making way through the water.
Vessel at anchor.
Vessel constrained by her draught, at anchor.
Vessel restricted in her ability to manoeuvre, not making way through the water.
Identify the vessel.
Vessel at anchor, length unknown, head-on.
Vessel not under command, length unknown, head-on.
Vessel at anchor, length unknown, stern-on.
Vessel at anchor, less than 50 metres in length, displaying single all-round white light.
Identify the vessel.
Vessel at anchor, seen from port side.
Vessel underway, seen from starboard side.
Vessel not under command, seen from starboard side.
Vessel at anchor, seen from starboard side.
Identify the vessel.
Vessel aground, seen from port side.
Vessel at anchor, seen from port side.
Vessel aground, seen from starboard side.
Vessel not under command, seen from port side.
Identify the vessel.
Vessel at anchor, not making way through the water.
Vessel aground.
Vessel not under command, not making way through the water.
Vessel constrained by her draught, not making way through the water.
Identify the vessel.
Vessel at anchor, requiring assistance.
Vessel not under command, not making way through the water.
Vessel in distress.
Vessel restricted in her ability to manoeuvre, requiring assistance.
Identify the vessel.
Vessel at anchor, requiring assistance.
Vessel not under command, making way through the water.
Vessel aground, requiring assistance.
Vessel in distress.
Identify the vessel.
Vessel in distress.
Vessel not under command, not making way through the water.
Vessel at anchor, requiring assistance.
Vessel aground, not making way through the water.
Identify the vessel.
Vessel aground, not making way through the water.
Vessel in distress.
Vessel at anchor, requiring assistance.
Vessel not under command, not making way through the water.
Identify the vessel.
Vessel constrained by her draught, underway.
Vessel at anchor, exhibiting anchor lights.
Vessel not under command, making way through the water.
Vessel in distress.
Identify the vessel.
Vessel restricted in her ability to manoeuvre (other than a vessel engaged in mine clearance operations), not making way through the water.
Vessel restricted in her ability to manoeuvre, making way through the water.
Vessel not under command, not making way through the water.
Vessel engaged in mine clearance operations, not making way through the water.
Identify the vessel.
Submarine, underway.
Submarine, at anchor.
Submarine, not under command, underway.
Warship, underway.
Identify the vessel.
Power-driven vessel, more than 50 metres in length, engaged in towing where the tow exceeds 200 metres in length, making way through the water and not restricted in her ability to manoeuvre.
Power-driven vessel, more than 50 metres in length, or less than 50 metres in length and showing the a second masthead light, engaged in towing where tow exceeds than 200 metres in length, being an inconspicuous, partly submerged vessel or object, restricted in her ability to manoeuvre.
Power-driven vessel, less than 50 metres in length, engaged in towing where the tow is less than 200 metres in length, restricted in her ability to manoeuvre.
Power-driven vessel, more than 50 metres in length, engaged in pushing a vessel or object ahead, with the length of the tow less than 200 metres.
Identify the vessel.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, length unknown, at anchor, no obstructions exist on either side of the vessel.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, length unknown, at anchor, with an obstruction on the port side.
Vessel engaged in dredging or underwater operations, restricted in her ability to manoeuvre, length unknown, at anchor, with an obstruction on the starboard side.
Vessel engaged in dredging or underwater operations, not restricted in her ability to manoeuvre, length unknown, at anchor, with no obstructions on either side.
What does this signal mean? - Open water - Clear conditions.
“I am altering my course to port”.
“I am operating astern propulsion”.
“I am altering my course to starboard”.
“I am altering my course to starboard and reducing speed”.
What does this signal mean? - Open water - Clear conditions.
“I am altering my course to starboard”.
“I am operating astern propulsion”.
“I am altering my course to port and reducing speed”.
“I am altering my course to port”.
What does this signal mean? - Open water - Clear conditions.
“I am altering my course to starboard.”
“I am altering my course to port.”
“I am stopping my engines and making no alteration of course.”
“I am operating astern propulsion.”
What does this signal mean? - Narrow channel - Clear conditions - Vessel in sight.
“I intend to overtake you on your starboard side.”
“I intend to overtake you on your port side.”
“I do not intend to overtake you.”
“I intend to overtake you on your starboard side and alter course to port.”
What does this signal mean? - Narrow channel - Clear conditions - Vessel in sight.
“I intend to overtake you on your starboard side.”
“I intend to overtake you on your port side.”
“I intend to overtake you on your port side and alter course to starboard.”
“I do not intend to overtake you in this narrow channel.”
What does this signal mean? - Narrow channel - Clear conditions - Vessel in sight.
“I do not agree to your overtaking manoeuvre.”
“I intend to overtake you on your starboard side.”
“I agree to your overtaking manoeuvre.”
“I am altering my course to allow you to overtake safely.”
What does this signal mean? (Select all applicable answers) - Open water - Clear conditions - Vessel in sight.
“I fail to understand your intentions.”
“I am altering my course to starboard.”
“I am in doubt that you are taking sufficient action to avoid collision.”
“I am altering my course to port.”
What does this signal mean?(select all applicable answers) - Single signal (not repeated at regular interval) - Narrow channel - View obscured by intervening obstruction.
“Signal to indicate that the vessel is altering her course.”
“Signal to indicate the presence of a vessel approaching from astern.”
“Signal to indicate presence to a vessel out of sight.”
“Response to a vessel, obscured from view, which has indicated her presence by a sound signal.”
What vessel makes this signal? - (Repeated - not more than 2 minute interval) - In or near an area of restricted visibility.
A power-driven vessel, making way through the water.
Power-driven vessel, length unknown, making way through the water.
A vessel not under command, making way through the water.
A vessel at anchor, not making way through the water.
What vessel makes this signal? - (Repeated - not more than 2 minute interval) - In or near an area of restricted visibility.
A power-driven vessel, making way through the water.
A power-driven vessel, stopped and making no way through the water.
A vessel not under command, stopped and making no way through the water.
Vessel restricted in her ability to manoeuvre, making way through the water.
What vessel makes this signal? (select all applicable answers) - (Repeated - not more than 2 minute interval) - In or near an area of restricted visibility.
A vessel not under command.
A vessel restricted in her ability to manoeuvre.
A vessel constrained by her draught.
A vessel constrained by her draught, stopped and making no way through the water.
What vessel makes this signal? - (Immediately after a sound signal comprising one prolonged blast plus two short blasts) - In or near an area of restricted visibility.
A vessel being towed, if unmanned.
A vessel engaged in pushing, if manned.
A vessel engaged in towing, making way through the water.
A vessel being towed, if manned.
What vessel makes this signal? - (Repeated - not more than 1 minute interval) - In or near an area of restricted visibility.
A vessel at anchor, less than 100 metres in lengt.
A vessel aground, less than 100 metres in length.
A vessel aground, less than 150 metres in length.
A vessel not under command, less than 100 metres in length.
What additional whistle signal might a vessel at anchor sound in restricted visibility, to give warning of her presence to an approaching vessel?
The code letter “T”.
The code letter “R”.
The code letter “K”.
The code letter “A”.
What length is the vessel making this signal? - (Repeated - not more than 1 minute interval) - In or near an area of restricted visibility.
Less than 100 metres.
More than 150 metres in length.
Between 50 and 100 metres in length.
100 metres or more in length.
What vessel makes this signal? - (Repeated - not more than 1 minute interval) - In or near an area of restricted visibility.
A vessel aground, less than 100 metres in length.
A vessel at anchor, more than 100 metres in length.
A vessel aground, more than 100 metres in length.
A vessel not under command, more than 100 metres in length.
What additional whistle signal might a vessel aground sound in restricted visibility, to give warning of her presence to an approaching vessel?
The code letter “S”.
The code letter “W”.
The code letter “Y”.
The code letter “U”.
What vessel makes this signal? - (Repeated - not more than 2 minute interval) - Open water - In or near an area of restricted visibility.
A pilot vessel engaged in pilotage duty, making way through the water.
A pilot vessel engaged in pilotage duty, stopped and making no way through the water.
A power-driven vessel engaged in towing, making way through the water.
A pilot vessel not engaged in pilotage duty, making way through the water.
What vessel makes this signal? - (Repeated - not more than 2 minute interval) - Open water - In or near an area of restricted visibility.
A pilot vessel engaged in pilotage duty, making way through the water.
A pilot vessel not engaged in pilotage duty, stopped and making no way through the water.
A power-driven vessel engaged in pilotage duty, stopped and making no way through the water.
A pilot vessel, engaged in pilotage duty, stopped and making no way through the water.
What vessel makes this signal? - (Repeated - not more than 2 minute interval) - Open water - In or near an area of restricted visibility.
A pilot vessel engaged in pilotage duty, less than 100 metres in length, at anchor.
A pilot vessel engaged in pilotage duty, less than 100 metres in length, making way through the water.
A pilot vessel engaged in pilotage duty, more than 100 metres in length, at anchor.
A pilot vessel not engaged in pilotage duty, less than 100 metres in length, at anchor.
What vessel makes this signal? - (Repeated - at 1 minute intervals).
A vessel not under command, making way through the water.
A vessel aground, not making way through the water.
A vessel in distress.
A vessel at anchor, requiring assistance.
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