An anchor which has become entangled with some object on the bottom, or, on weighing, has it's rode or chain wound around its stock or flukes.

Another term for a marine railway.

Blowdown.

A sudden and violent gust of wind.

Small, circular sheets of newly-formed ice that do not impede navigation.

A compartment forward where the chain cable is stowed.

A built in mechanical device to recover a portion of the power consumed by a constant speed centrifugal compressor when operating at reduced capacity or reduced pressure rise, or both.

The wind direction indicator on the masthead.

A set of radio, sound, and visual signals designed to aid in communications between vessels without language problems. It can be used with Morse Code, with signal pennants, and by spoken code letters.

A bollard with horizontal arms, forming the shape of a cross, as a means of belaying lines.

The rod connecting the disc to the lever on a valve.

On a square-rigged ship, a light weather sail set next above the royal in fair weather.

Wind coming from the south.

Placing a container where required to be loaded or unloaded.

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

A "C" shaped fitting which can be slipped over the boom, for example, when the sail has been roller reefed to allow the boom vang to be reattached.

The imaginary line running from bow to stern along the middle of the boat.

see Turnbuckle

To permanently join two pieces of rope. It will not pass through a block since it increases the diameter

A large balloon shaped lightweight sail used when running or reaching. Spinnakers are made of cloth very similar to that used for parachutes, which is why you may also hear them called chutes, or kites.