Bail

Bottom

The underwater surface of the hull.

Barometer

A pressure-measuring instrument whose readings are used to monitor and predict weather tre…

Bulwark

A solid raised extension of the topsides above deck level, providing a barrier against fal…

Bend

To make fast — attaching a sail to a spar or stay, or tying a line to a sail.

Boat speed

The speed at which the hull moves through the water, as opposed to speed over ground.

Bus bar

A heavy copper or brass terminal strip to which multiple battery cables or circuits are co…