An area of low barometric pressure. The wind circulates clockwise in the Southern Hemisphere and counter-clockwise in the Northern Hemisphere. Generally these are bad weather systems.(2)A severe recession over a lengthy.

A horizontal pole or spar attached to the mast to which the foot (lower edge) of the sail is fastened

Closing small leaks in a vessel's underwater body by drawing a sail, filled with oakum, underneath her.

To attach a boat to a mooring, dock, post, anchor, etc.

A book with a record of every occurrence and incident concerning the ship.

Back pressure.

Maximum pressure a vessel, or air filter housing will withstand without bursting.

A non-negotiable bill of lading which states a specific identity to whom the goods should be delivered. See Bill of Lading.

Costs that do not vary with the level of activity. Some fixed costs continue even if no cargo is carried. Terminal leases, rent and property taxes are fixed costs.

The actual work required to compress and deliver a given gas quantity, including all thermodynamic, leakage and fluid friction losses. It does not include mechanical losses.

A preparatory order (wait

(1) A round eye through which a line is led, usually in order to change the direction of pull. (2) A thick piece of glass set flush in the deck to admit light below.

A sleeping berth or bed.

The power which is theoretically required to compress a gas under constant entropy from a given inlet pressure to a given discharge pressure. (calculated assuming ideal conditions).

A liquid piston compressor is a rotary compressor in which a vaned rotor revolves in an elliptical casing, with the rotor spaces sealed by a ring of liquid rotating with it inside the casing.

The bottom of a wave, the valley between the crests.

The assembly connecting the crankcase and connecting rod to the cylinder head and piston rod for translating circular to linear motion.

A position of a flag when lowered part way in salute (method of salute between vessels, like planes dipping wings).

A form used to acknowledge receipt of cargo and often serves as basis for preparation of the ocean bill of lading.