The motion of air relative to a body in it.

Boards used to close the companionway.

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.

(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.

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 ...

A condition where the particles (dust) becomes embedded in the fabric filter over time and are not removed by the bag cleaning process.

A grooved metal extrusion fitted on a forestay and used to secure the luff of a sail by holding its bolt rope in place.

A rope spliced into the end of a block and used for making it fast to rigging or spars. Such a block is called a tail-block.

The framework of timber, etc., on which a vessel is built, from which she is launched into the water.

The air compressor continues to run, usually at full RPM, but no air is delivered because the inlet is either closed off or modified, not allowing inlet air to be trapped.

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.

A floating log

An act of Congress (1903) prohibiting rebates, concession, misbilling, etc. and providing specific penalties for such violations.

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

A distinctive fixed reference point that can be used for navigation.

A rope net to catch the jib when it is lowered.

A small rail on tables and counters used to keep objects from sliding off when the vessel rolls and pitches.

An annual publication that contains tidal information and information about the position of the sun, moon, planets and stars. This information is used for celestial navigation.

A crack or hole that accidentally admits a gas or lets it escape.