Breadth in the Waterline (BWL) – Definition and Pronunciation
What is BWL?
BWL (Breadth at Waterline) is the width of a ship measured at the water’s surface where the hull intersects the water. It indicates the vessel’s maximum transverse dimension at the waterline, affecting stability and cargo capacity.
Examples of BWL
Dr Eng H Brandt, Professor of Hydrodynamics at the Technical University in Berlin, has developed a calculation method that allows comparisons to be made between similar boats, and that produces a yacht’s sailing performance by means of a performance-ratio. For this you need details of the: boat’s LWL; BWL; sail area and displacement.
From “Comprehensive Guide to Sailboat Maintenance and Modifications”.
The waterline length (LWL), breadth on the waterline (BWL), displacement (V) and sail area (AS) are considered in relation to one another, as boatbuilders and designers would also do when evaluating a yacht.
From “Understanding Yacht Design – Key Features and Performance Ratios”.
This is the basis for calculations with regard to the sail-carrying ability of fin-keeler, bilge-keeler and centre boarders. The BWL is responsible for a boat’s initial stability.
From “Choosing the Right Yacht – Essential Considerations for Every Sailor”.
Pronunciation of BWL
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