An apparatus consisting of an outside shell and a sheave through which a rope may be passed (pulley).

Fluid cooling agent.

Once the only method, other than human voice, of passing orders to men on board ship; the instructions to perform certain tasks were conveyed by different notes and pitches on the high-pitched whistle.

To carry sail to the full limit of strength of masts, yards, and tackles.

C The international temperature scale where water freezes at 0 (degrees) and boils at 100 (degrees). Also known as the centigrade scale.

An old naval saying to indicate those young men who, through birth or connection, were able to enter the Royal Navy without examination. Their subsequent promotion was assured.

White-lead and tallow used on standing rigging.

Blocks of wood made to fit in the hawse-holes, or holes in the half-ports, when at sea. Those in the hawse-holes are sometimes called hawse-blocks.

Pair of hooks linked together and attached to a crane.

A rope sewn into the luff or foot of a sail for use in attaching to the mast or boom.

Is a positive displacement reciprocating compressor using a flexible membrane or diaphragm in place of a piston.

An object made with more than one type of material.

A machine used to pick up and move goods loaded on pallets or skids.

A blast of from 4 to 6 seconds' duration.

The magnetic compass used by the navigator as a standard.

A sudden and violent gust of wind.

A device that indicates pressure differential above or below atmospheric pressure.

A valve which enables pressure to be reduced, or kept constant at a desired level.

Fresh bread.

In sailboat racing, a tactical maneuver to lock in a competitor by tacking on them in close proximity so they can not tack from under your boat and they start to lose speed due to your sails blocking their sails.