Member of a crew who works all day but does not keep the normal watches.

Anti-clockwise circular motion. Left-handed ropes are coiled down in this way.

A unit of electrical current or rate of flow of electrons through a conductor. One volt across one ohm of resistance causes a current flow of one ampere. One ampere is equal to 6.25 x 1018 electrons per second passing a set point in a circuit.

See Intracoastal Waterway.

Stormy conditions, including rough, high seas and strong winds.

An opening in a ship's deck for the loading and discharging of any kind of cargo.

Is a measure of the rate of change of viscosity with temperature. Oils with high VI have low viscosity changes.

An annual publication that contains tidal information and information about the position of the sun, moon, planets and stars. This information is used for celestial navigation.

Light, bulky articles.

The order in which compressors are brought online.

In sailboat racing, to disturb the wind of a windward boat by positioning your boat a bit ahead and to leeward. If done correctly, the disturbed air hitting the windward boat will slow it down, leaving it at a distinct disadvantage and causing it to tack ...

1,000 board feet. One MBM equals 2,265 C.M.

To charge less than the proper amount.

A sprocket wheel on the windlass for taking links of the chain cable.

Before the introduction of man-made fibers, much of the rope used at sea was made from manila. Made from the fibers of banana plants in the Philippines, manila did not rot when it was exposed to seawater.

A compressor cooled by atmospheric air circulated around the cylinders or casing.

A projecting aperture at the end of a tube, pipe etc. serving as an outlet for compressed air. Reduces the demand on the compressor by generating the highest thrust and volume for the lowest possible air consumption.

Artificial objects to supplement natural landmarks indicating safe and unsafe waters.

Open Shelter Deck ship.

The framework of timber, etc., on which a vessel is built, from which she is launched into the water.