A floating island of ice. Only one-ninth of the total mass of an iceberg is visible above water level.

A charge, based on a fixed daily rate.

The compression of an air actuator (air spring) below its design height.

Navigation and Inspection Circular (US Coast Guard)

Distance at sea is measured in nautical miles, which are about 6067.12 feet, 1.15 statute miles or exactly 1852 meters. Nautical miles have the unique property that a minute of latitude is equal to one nautical mile - Measurement of speed is done in knots ...

To bagpipe the mizzen, is to lay it aback by bringing the sheet to the weather mizzen rigging.

Is a gas that follows the perfect gas laws without deviation. There is no such thing, however it is the basis from which calculations are made and corrections applied.

That part of a shaft or axle that rotates or angularly oscillates in or against a bearing or about which a bearing rotates or angularly oscillates.

a circular donut-shaped buoy designed to support a person in the water. It is attached to the vessel with a (floating) line so that the person can be hauled back to the boat.

The direction to which a compass points. Magnetic north differs from true north because the magnetic fields of the planet are not exactly in line with the north and south poles. Observed differences between magnetic and true north is known as magnetic var ...

To store a yacht away on land for the winter

Combination minimum pressure valve and check valve.

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.

Transaction or interchange that occurs at the time a container leaves a rail or water terminal.

A spar used to prevent the spinnaker guy from fouling on the stanchions.

CFM flowing through the compressor inlet filter or inlet valve under rated conditions

Those frames of a ship's hull which are equal in area, one forward and one aft of the ship's center of gravity.

A pin placed through the head of a rudder to prevent it from being lost.

Sailing with the tiller over to leeward by force of the wind

Six feet. Comes from the Dutch word "fadom" which was the distance between fingertips of outstretched hands.A unit of measurement relating to the depth of water or to the length of line or cable; one fathom is 6 feet or 1.83 meters