A heavy longitudinal timber that angles upward from the stern to support the underside of the fantail.

(1) The points of the jaws of a boom or gaff where they embrace the mast. (2) The outer ends of the crosstrees.

Areas of the ocean lying between the mostly westerly winds of the higher latitudes, and the trade winds. These areas usually have prolonged calms, and in the older days of sail it could take quite a while to clear out of this area, by which time the seame ...

The latitudes on the outer margins of the trades where the prevailing winds are light and variable.

An unhandy seaman.

Is a unit of work equal to 33,000 foot pounds per minute, 550 foot pounds per second, or 746 Watts.

The horsepower input to the compressor shaft, or more generally to any driven machine shaft.

The actual work required to compress and deliver a given gas quantity, including all thermodynamic, leakage and fluid friction losses. It does not include mechanical losses.

The horsepower required to isothermally compress the air or gas delivered by the compressor at specified conditions.

The horsepower calculated from compressor-indicator diagrams. Applied only to displacement type compressors.

The maximum power required by a given compressor when operating at a (1) constant discharge pressure with variable intake pressure, or (2) constant intake pressure with variable discharge pressure.

The horsepower required to compress adiabatically the air or gas delivered by the compressor through the specified range of pressures.

A floatation device shaped like a U and thrown to people in the water in emergencies.

A term applied to the gas found on the high pressure side of the refrigeration system.

A valve which connects the high pressure side of a compressed air system to the suction side and is adjusted so as to maintain a specific pressure on the suction side by controlled bleeding of hot gas to the suction side.

The compressor is started automatically, depending on demand. Control panel is energized with no "pre-start" cycle required, as pre-lubrication pump and buffer (seal) air are always "on". A state of pre-start exists. Steam turbine compressors are "slow-ro ...

Wooden shoulders attached below the masthead to either side of a wooden mast which originally supported the trestle trees.

To stow or secure in a safe place. A top-mast is housed by lowering it and securing it to a lowermast.

Distinguishing flag of a merchant marine company flown from the mainmast of merchant ships.