Is used in psychrometry and is the temperature recorded by a thermometer whose bulb has been covered with a wetted wick and whirled on a sling psychrometer. Taken with the dry bulb, it permits determination of relative humidity of the atmosphere.

A gauge that measures air flow as a percentage of capacity, used in rotary screw compressors as an estimator during modulation controls.

The toal temperature at the intake flange of the compressor.

Board, bearing instructions, that comes to a wrecked ship with a life-saving rocket line.

Cargo which has been booked but does not arrive in time to be loaded before the vessel sails. See also "Windy Booking."

The bridge used for taking observations, or directing the handling of the ship.

Stemming the tide or sea means to head the vessel's bow directly into the current or waves. Overcome adverse circumstances.

A rope used for securing any movable object in place

To untie.

A law of chemistry and physics: the rate of diffusion of one substance in another is proportional to the negative gradient of the concentration of the first substance.

A pin placed through the head of a rudder to prevent it from being lost.

Valve of a pump box; to prime a pump.

(1) To throw, as to heave a line ashore. (2) An upward pull on a line; to lift (3) The rise and fall of a vessel in a seaway.

This is a factor expressing deviation of a gas from perfect gas laws.

A large foresail or jib that overlaps the mainsail. Also known as a genny. Can be expressed in percentages of overlap, e.g. 150 Genoa is 50% overlap of the mainsail.

Official terminology for life jacket. When properly used a PFD will support a person in the water. Also called a life jacket, life preserver or life vest.

The windward side (from where the wind is blowing).

Slang for getting married. A splice joins two lines together permanently.

Ropes hung and used for assistance in ascending and descending.