IDESS iTest Online for Deck Officers – F1 Maritime Navigation, Operational Level
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Amount of questions: 41.
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__________ is the angular distance between the prime meridian and the meridian of a point on the earth, measured eastward or westward from the prime meridian through 180 degree.
Latitude.
Longitude.
Difference of Latitude.
Difference of Longitude.
The process where a navigator constantly evaluates the ship s position, anticipates dangerous situations well before they arise, and always keeps ahead of the vessel.
Evaluation.
Instruction.
Navigation.
Situation.
__________ is the angular distance from the equator, measured northward or southward along a meridian from 0 degree at the equator to 90 degree at the poles.
Latitude.
Longitude.
Difference of Latitude.
Difference of Longitude.
__________ is the direction in which a vessel is pointed, expressed as angular distance from 000 degree clockwise through 360 degree.
Bearing.
Heading.
Course.
Track.
__________ is the direction from the ship to another ship and/or one terrestrial point/object, expressed as angular distance from 000 degree (North) clockwise through 360 degree.
Bearing.
Heading.
Course.
Track.
____________ termed as latitude and longitude, can define any position on earth.
DLAT.
Coordinates.
Tide and Current.
Altitude.
The difference between the magnetic meridian and the geographical meridian.
Compass Bearing.
Compass Error.
Deviation.
Variation.
The_________ is a great circle midway between the poles.
Equator.
Bearing.
Meridian.
Courses.
The difference between the magnetic compass needle point and the magnetic meridian.
Compass Bearing.
Compass Error.
Deviation.
Variation.
_____________ is the rate of motion, or distance per unit of time.
Speed.
Course.
Bearing.
Time.
It is a compass error caused by the magnetic properties of any metal in the immediate vicinity of the compass.
Variation.
Deviation.
Compass Error.
Magnetic Error.
____________ the unit of speed commonly used in navigation, is a rate of 1 nautical mile per hour.
Centimeter.
Kilometer.
Knots.
Bearing.
It is caused by the difference in position of the Geographic Poles and the Magnetic Poles.
Deviation.
Variation.
Compass Error.
Magnetic Error.
The algebraic sum of deviation and variation.
Deviation.
Variation.
Compass Error.
Magnetic Error.
_____________ is the horizontal direction in which a vessel is steered or intended to be steered, expressed as angular distance from north clockwise through 360.
Bearing.
Course.
Altitude.
Distance.
Tides are the periodic motion of the waters of the sea due to changes in the attractive force(s) of the _____.
Moon and Sun upon the rotating earth.
Moon upon the rotating earth.
Sun upon the rotating earth.
Planets.
A great circle through the geographical poles of the earth.
Equator.
Longitude.
Latitude.
Meridian.
The terrestrial great circle whose plane is perpendicular to the polar axis. It is midway between the poles.
Equator.
Longitude.
Latitude.
Meridian.
The meridian used as the origin for measurement of longitude.
Latitude.
Prime meridian.
Longitude.
Meridian.
A nautical mile is equal to _________meters.
1 600 meters.
6 080 meters.
1 852 meters.
1 500 meters.
A circle on the surface of the earth, parallel to the plane of the equator. It connects all points of equal latitude.
Difference of Latitude.
Parallel of latitude.
Departure.
Latitude.
_____________ difference between the compass heading and the magnetic heading, due to ships construction and ship location.
Deviation.
Application.
Correction.
Intention.
What does RADAR mean?
Radio Distance Apparatus.
Remote Detecting and Range.
Radio Detection And Ranging.
None of the above.
The point on the celestial sphere vertically overhead of an observer _____.
Zenith.
Nadir.
North Pole.
North Point.
The point on the opposite side of the sphere vertically below the observer.
Zenith.
Nadir.
South Pole.
South Point.
Which is NOT a distress signal under the Rules?
Orange-colored smoke.
Red flares.
The repeated raising and lowering of outstretched arms.
International Code Signal \"AA\".
A light signal of three flashes means _________.
\"My engines are full speed astern\".
\"I am in doubt as to your actions\".
\"I am operating astern propulsion\".
\"I desire to overtake you\".
A power driven vessel \"not under command\" at night shall show her sidelights when ______.
making no headway.
making headway.
not at anchor.
moored to a buoy.
A power-driven vessel underway in fog making NO way must sound what signal?
One long blast.
One prolonged blast.
One prolonged and two short blasts.
Two prolonged blasts.
How long is the duration of a PROLONGED BLAST?
4 to 6 seconds duration.
2 to 4 seconds duration.
6 to 8 seconds duration.
8 to 10 seconds duration.
A self-propelled dredger not engaged in dredging but proceeding to a dredging position shall exhibit __________.
not required to show any light but all round white light.
lights of a dredger.
an all-round white light.
lights of a power driven vessel.
A vessel 75 meters in length and restricted in her ability to maneuver is carrying out her work at anchor. What signal should be sounded in restricted visibility?
4 short blasts at intervals of not more than 2 minutes.
5 seconds ringing of a bell and 5 seconds sounding of a gong at intervals of not more than 1 minute.
1 prolonged blast followed by 2 short blasts at intervals of not more than 2 minutes.
5 seconds ringing of a bell at intervals of not more than 1 minute.
A vessel aground must display by day __________ in a vertical line.
three black balls.
two black balls.
two black balls and a black diamond shape in between.
two black diamond shapes and a black ball in between.
A vessel aground must display by night __________ in a vertical line, in addition to the lights required for a vessel at anchor.
two white lights.
three white lights.
three red lights.
two red lights.
A vessel shall be deemed to be ____________ when coming up with another vessel from a direction more than 22.5 degrees abaft her beam and at night she would be able to see only the stern light of that vessel but neither of her sidelights.
overtaking.
crossing.
passing.
meeting.
A vessel at anchor shall display ________ between sunrise and sunset on the forward part of the vessel where it can be best seen.
2 black balls.
1 black ball.
1 red ball.
2 orange and white balls.
A vessel is \"in sight\" of another vessel when ________.
she can be seen well enough to determine her heading.
she can be observed visually or by radar.
she can be observed visually from the other vessel.
her fog signal can be heard.
A vessel is being propelled both by sail and by engines. Under the Rules, the vessel is _______.
considered a power-driven vessel.
considered a \"special circumstance\" vessel.
could not cover under any category.
considered as a sailing vessel.
A vessel is considered \"engaged in fishing\" according to the Rules of the Road, when ________.
showing lights and shapes for a vessel restricted in her ability to maneuver.
using trawling lines.
when a vessel is power driven.
using fishing apparatus that restricts her maneuverability.
A vessel must proceed at a safe speed _______.
in restricted visibility.
at all times.
in congested waters.
during darkness.
A vessel showing the International Code Flag \"A\" is engaged in ________.
mine clearing operations.
dredging.
fishing.
diving operations.
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About
Senior Mate with 12+ years of experience in the international merchant marine.
- Development and implementation of navigation and on-board safety plans.
- Supervising the work of the crew and assisting the captain in managing the vessel.
- Participation in training of junior crew, ensuring compliance with safety standards.
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October, 15, 2026 16 0
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