Speed through the water, not "over ground".

Another term for first mate.

The condition of the tide when there is no horizontal motion.

An air operated device for hoisting or pulling. Similar to a winch

The ratio of fuel consumption to compressor capacity.

A precursor to the sextant. An old navigational device for checking the altitude of the sun or stars.

To call out.

A factor expressing the deviation of gas from the laws of hydraulics.

A valve that controls the flow in air lines.

To reduce the volume of, by or as if by pressure.

This property of a gas is the weight of air or gas per unit volume. Unless specified, it refers in compressor practice to the weight per unit volume at conditions of total temperature, total pressure and composition which prevail at the compressor intake.

Used to confine the bowsprit down to the stem or cutwater.

An extension of the keel for protection of propeller and rudder.

A sail attached to the forestay as opposed to a jib which is attached to the headstay.

National flag or insignia flown by a ship at sea.

The cabin roof, raised above the deck to provide headroom in the cabin. Also trunk.

A small double-pronged bendable pin used to secure a clevis pin or to keep turnbuckles from unwinding.

Large bollards affixed to the main deck near the bow of a square rigged vessel around which hawsers or anchor cables were belayed.

An oil-skin hat with broad rear brim.

A dog or brace to hold objects rigidly in place.