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

A permanent loop spliced in the end of a line, sometimes around a thimble.

Maximum allowable working pressure. This data is found on the pressure vessel nameplate and is the maximum pressure at which the lowest set safety valve must be set (stamped).

Standing or running (adjustable) wire rigging that supports the mast from the stern; a wire mast support leading aft to the deck or another mast

A valve with a faucet type handle used to restrict the flow of water in a line

Oscillations of the sea caused by wind blowing along the surface and moving in the direction from which the wind blows.

A brand of lightweight anchor. It has pivoting flukes that dig into the ground as tension is placed on the anchor.

Namely. Used in tariffs to specify commodities.

Freight that has not been called for or picked up by the consignee or owner.

To leave a ship without authority (deserting).

The ship's water closet (toilet or wash-room). The upper edge of a quadrilateral sail.

Kilograms per square centimeter absolute.

After mast on a schooner or sailing ship carrying a spanker; usually the fourth mast of a five or six masted schooner.

This is a factor expressing deviation of a gas from perfect gas laws.

Kilowatt hour - A unit of work, being the work done in one hour at the rate of 1,000 watts.

A warning from aloft (heads up).

A solid wharf or structure built of stone along the edge of a harbor used for loading and offloading of cargo, and embarkation and disembarkation of passengers.

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.

(1) To float a vessel off the ways in a building yard after it is completed. (2) A small boat used to ferry people to and from a larger vessel.

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