All in the wind. When the sails have the wind edge-on and shake.
Amidships. In the middle. In line with the keel.
Athwartships. Across the boat. At right angles to the keel.
Avast. An order to stop or discontinue anything.
A-weather. The side towards the wind; to the windward side.
Backstays. Stays or shrouds leading aft to support a mast or topmast.
Bear up. To turn from the wind.
Belay. To secure a rope about a cleat or pin.
Bend. To make fast. A kind of knot.
Berth. An anchorage or mooring. A slip or place where a boat rests at a dock. A sleeping place.