Aft

Athwartships

Running across the vessel from one side to the other, at right angles to the fore-and-aft …

Asymmetric spinnaker

A downwind sail (also called a cruising chute or gennaker) with a fixed tack but no pole, …

Astern

In the water behind the vessel, or moving backwards.

Alternator

An engine-driven generator that converts mechanical rotation into alternating current, whi…

Apparent wind

The wind actually experienced on board, produced by combining the true wind with the wind …

Aboard

On, onto, or inside the vessel.