(1) Hardening suitable a = b alloys (most often certain copper or titanium alloys) by solution treating and quenching to develop a martensite-like structure. (2) In ferrous alloys, hardening by austenitizing and then cooling at a rate such that a substant ...

An electrical depth sounder or fish finder that uses sound echoes to locate the depth of objects in water. It does so by timing the sound pulses.

A drag-type wind machine that can react to wind from any direction.

Same as freezing point.

An insurance policy arranged by either the buyer or the seller to insure goods against damage in transit. The appropriate Incoterm will determine the responsibility of the buyer or seller to arrange the insurance.

The mean wind speed over a specified period of time.

An enzyme complex, produced by fungi and bacteria, capable of decomposing cellulose into small fragments, primarily glucose.

see Peak Power

The part of the total carbon in steel or cast iron that is present as other than free carbon.

Towing Safety Advisory Committee

An instrument for indicating or measuring a small electric current by means of a mechanical motion derived from electromagnetic or electrodynamic forces produced by the current.

A device that measures the intensity of direct beam solar radiation.

Before the introduction of man-made fibers, much of the rope used at sea was made from manila. Made from the fibers of banana plants in the Philippines, manila did not rot when it was exposed to seawater.

Inlet butterfly valve. These are fitted on the inlet of most types of compressor and the valve opens and closes to throttle the air flow. However, the term IBV is usually associated with turbo compressors.

The motion of air relative to a body in it.

A measurement unit defining the purity of gold. Pure gold is 24 carat, whilst 18 carat gold.

Boards used to close the companionway.

A type of filter capacity test in which a clogging contaminant is added to the influent of a filter, under specified test conditions, to produce a given rise in pressure drop across the filter or until a specified reduction of flow is reached. Filter life ...

(1) Old nickname for a sailor, who would treat his canvas coats and hats with tar as a protection against the weather. (2) The distilled residue of gum extracted from pine trees, used for preserving many things.

Black diamond, ball, and cone shapes hoisted on vessels during the day to indicate restricted movement, ability, or type. For example three balls means aground.