Covered tunnels within a ship through which the tail shafts pass.

A method of storing a sail, e.g., by rolling the jib around the headstay.

An attachment point for another object.

Cubic feet per minute (cfm) of air required at the inlet to the distribution system.

The north end of the earth's axis and also called North Geographic Pole. The direction indicated by 000

Electro-mechanical steering device; an instrument designed to control automatically a vessel's steering gear so that she follows a pre-determined track through the water.

On square-rigged ships, an additional sail set in good weather outside the square sails when the wind was abaft the beam.

Sailing in the same direction as the wind with the wind coming from the stern.

The standard atmosphere is defined as the pressure exerted by a column of mercury 760 mm high with a density of 13,595 g/cm

Old seafaring term meaning something very difficult or awkward. see Devil

The locker in which the bos'n keeps his deck gear.

The maximum rate at which an engine can do work as measured by the resistance of an applied brake. Expressed in horsepower.

Air pressure

The distance from the surface of the water to the main deck or gunwale.

The distance the ship's side falls in towards the center line above the load water line. Opposite of flare.

A multihulled boat with three hulls.

Vibration isolation mount. Provides reductions in vibration transmission.

Anchor is off the sea bottom when being heaved in .

To haul on a rope, to haul up tight, to hoist the last possible inch or so.

The horsepower required to compress adiabatically the air or gas delivered by the compressor through the specified range of pressures.