Ballast

Weight — usually carried low in the keel — that lowers the centre of gravity and gives the boat stability and righting moment.

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Related B-terms

Barometer

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

Boom

The horizontal spar that extends aft from the mast and carries the foot of the mainsail.

Bilge

The lowest internal part of the hull, where water inevitably drains and collects.

Bowline

A classic knot that forms a secure, non-slipping loop and can still be untied after heavy …

Below

Any space inside the vessel that is beneath the deck.

Broach

A sudden, unintended round-up into the wind, usually while running or reaching in strong b…

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