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Encyclopedia of Marine and Energy Technology

Breadth of the ship


Depending on the purpose, the following definitions of breadth (B) are used:

1. The maximum breadth of the ship, measured amidships to the moulded line of the frame in a ship with a metal shell and to the outer surface of the hull in a ship with a shell of any other material, (MARPOL).

2. The extreme width from outside of the frame to outside of the frame at, or below, the deepest subdivision load line, (SOLAS).

Extreme breadth – The maximum breadth over the extreme points between port side and starboard of the ship.

Moulded breadth – The greatest breadth of the ship measured between the inside edges of the shell plating.