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

Standard pressure and temperature. See standard air.

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

The original name for the left side of the vessel when facing forward. The name was changed to Port to avoid any confusion with starboard, the right side of the vessel when facing forward.

Condensation which occurs when a ship sails from a cool to a relatively warm climate.

A rope used for towing or, mooring.

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.

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

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.

When compressed air is forced through a submerged perforated hose or pipe. Some applications include; ice prevention, reduction of salt intrusion, underwater basting, pneumatic breakwaters and general mixing and agitation

The motion of air relative to a body in it.

Reciprocating type compressor used mainly in oil and gas field applications. The compressor cylinders operate at low compression ratios and experience small temperature rise.

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

A Short line used to attach one thing to another - a short rope or cord that secures or attaches an item onboard a boat, usually for keeping it attached to the boat

A term indicating a temperature relationship between two temperatures or temperature variation between two points.

A unit of electrical current or rate of flow of electrons through a conductor. One volt across one ohm of resistance causes a current flow of one ampere. One ampere is equal to 6.25 x 1018 electrons per second passing a set point in a circuit.

To come alongside.

To sail against the prevailing wind and seas.

Measuring point for compressor acceptance test. Pressure before an orifice or nozzle, downstream of compressor discharge.

Is a measure of resistance to deformation, or reluctance to be squeezed out a bearing. Indicates the internal friction of a fluid. Viscosity in normal lubricants is reduced as temperature increases