The distance between a rope's adjacent strands, giving a measure of the tightness of the lay. The shorter the distance, the harder the lay. When a line has been overused and the lay has become slack, it is said to be slack-jawed.

Standing or running (adjustable) wire rigging that supports the mast from the stern; a wire mast support leading aft to the deck or another mast

Is the pressure exerted by a vapor confined within a given space. The vapor may be the sole occupant of the space, or may be associated with other gases.

International Convention on Oil Pollution Preparedness,Response and Co-operation, IMO

A thin, flexible wooden or plastic strip inserted into a pocket (batten pockets) on the back part (leech) of a sail to stiffen it and assist in keeping its form.

A compressor belonging to the group of dynamic compressors. Characterized by having its flow in the axial direction.

An opening in a ship's deck for the loading and discharging of any kind of cargo.

A strong tropical counterclockwise revolving storm the southern hemisphere. In the northern hemisphere these storms revolve clockwise and are known as hurricanes.

A place suitable for anchoring in relation to the wind, seas and bottom.

Slang name for the Q Flag. Also an old term for yellow fever.

An international goods classification system for describing cargo in international trade under a single commodity-coding scheme. Developed under the auspices of the Customs Cooperations Council (CCC), an international Customs organization in Brussels, thi ...

A yard or pole extending the head or foot of the topsail beyond the topmast or gaff of a gaff-rigged boat

Holes cut in a plate to make it lighter and yet not reduce its strength.

A sea which is traveling in the opposite direction to that of the boat

A rope used for towing or, mooring.

Thread - Unified national coarse.

International data interchange standards sponsored by the United Nations. See UN/EDIFACT.

An enterprise in which there is a risk of loss.

The distance between the water level at chart datum and an overhead obstacle such as a bridge or power line.

To unfold or unroll a sail. The opposite of furl.