The compression of an air actuator (air spring) below its design height.

Arrival at land

A projecting aperture at the end of a tube, pipe etc. serving as an outlet for compressed air. Reduces the demand on the compressor by generating the highest thrust and volume for the lowest possible air consumption.

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

Those frames of a ship's hull which are equal in area, one forward and one aft of the ship's center of gravity.

The storage of heat energy during utility off-peak times at night, for use during the next day without incurring daytime peak electric rates.

Nautical name for an anchor. Originally, was a stone used as an anchor.

Heavy Fuel Oil

Electroplating tin on an object.

The array of indicating marks and figure in relation to which the position of an index is observed, i.e. a scale plate on a recorder.

The distance that an observer can see vertically into a surface-based obscuring phenomenon such as fog, rain, or snow. The distance estimate must be based upon ceiling balloon ascensions or ceiling light projector measurements.

The action of letting go the sheets of a sailing vessel, thus spilling the wind and reducing the forward motion of the boat.

The increase in pressure in the discharge header that develops as a result of flow after the pressure relief device opens

A heating system, such as a solar water heater or geothermal heatpump, in which the working fluid is heated and used directly; in an open-loop solar system, the domestic water is circulated in the collector loop.

A mechanical/electrical device used to pull air out of an interior space; usually located in the highest location of a building, in the ceiling, and venting to the attic or directly to the outside.

A spar used to prevent the spinnaker guy from fouling on the stanchions.

Prince William Sound

The wind speed and direction at various levels in the atmosphere above the level reached by surface weather observations.

The transfer of heat through a material by the transfer of kinetic energy from particle to particle; the flow of heat between two materials of different temperatures that are in direct physical contact.

To bagpipe the mizzen, is to lay it aback by bringing the sheet to the weather mizzen rigging.