The ratio of available energy per pound; usually used to compare storage batteries.

One pound of water in vapor phase; is NOT steam pressure, which is expressed as pounds per square inch (psi).

Pounds/force per square inch gauge.

Tuesday 29th October 1929 when stock prices on Wall Street.

The difference between the maximum extended height and the compressed height of an air actuator.

The rate of decrease of pressure per unit distance at a fixed time.

To drag the bottom for an anchor. Also, large oars used in small vessels to force them ahead.

A fix taken by taking bearings of a single object over a period of time. By using the vessel's known course and speed, the location of the vessel can be found.

The amount of heated air, or heating capacity, to be supplied by a heating system; usually the maximum amount to be delivered based on a specified number of heating degree days or design outside temperature.

See: 'calendar.

A unit linked single premium whole life assurance policy. Part of the premium gives life cover.

Same as water year.

In aviation terminology, route or terminal weather conditions of sufficiently low visibility to require the operation of aircraft under instrument flight rules.

A sound where the level fluctuates through a total range of less than 5 dB(A) as measured on the "slow" response of a sound level meter in one minute.

To intercept the wind. A vessel or highland to windward is said to becalm another. So one sail becalms another.

Force per unit area, usually expressed in pounds per square inch (PSI) or BAR.

A building with more than 50 percent of its floorspace used for commercial activities, which include stores, offices, schools, churches, libraries, museums, health care facilities, warehouses, and government buildings except those on military bases.

Insulation made from rockwool fibers, fiberglass, cellulose fiber, vermiculite or perlite minerals, and composed of loose fibers or granules can be applied by pouring directly from the bag or with a blower.

Those levels at and above which persons exposed to them without protection are at risk of sustaining a noise induced hearing loss.

A paint applied to the boat's bottom below the waterline which contains "poisons", such as copper, to inhibit the growth of marine life such as weeds or barnacles.