Canvas, cloth, leather, tubing, rubber or other material placed around a line or cable to protect it from wear and abrasion

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.

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

BTU. The amount of heat required to raise the temperature of one pound of water one degree Fahrenheit under set conditions of temperature and pressure.

A raised portion of the hull forward of the cockpit intended to prevent water entering.

To temporarily stop all movement of a line through a block by placing the hauling part across the sheave of the block. This jams the sheave and holds it tight, and a pull on the hauling part will release it.

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 type of journal bearing in centrifugal air compressors.

A document specifying the nation of registry of the vessel.

The point (speed of sound) at which air flow through an orifice can not increase regardless of pressure drop.

Froth of sea foam.

An official signature or seal affixed to certain documents by the consul of the country of destination.

The wind direction indicator on the masthead.

A structure of heavy timbers placed between ground ways and cradle to support the ship during launching.

Steel section running along the length of each bottom edge of a shipping container giving its structural strength.

Placing a container where required to be loaded or unloaded.

A vertical post extending above the deck for securing mooring lines

On steam vessels has responsibility for the boilers, on diesels, the evaporators and the auxiliary equipment.

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

The anti-corrosive paint used on and above the waterline.