A term which describes the rising of warm air above cold air when two air masses of different temperatures, humidity and pressure meet.

This type of heat pump is known as an air-to air system.

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

Alert (pep it up!).

Same as water year.

A device used to keep a line from slipping, such as a jamcleat.

Singapore 30-mile limit Service.

The number of cycles through which an alternating current passes per second; in the U.S. the standard for electricity generation is 60 cycles per second (60 Hertz).

Power plants, whose output depends on a factor(s) that cannot be controlled by the power generator because they utilize intermittent resources such as solar energy or the wind.

A method of depositing thin semiconductor photovoltaic) films. With this method, physical processes, such as thermal evaporation or bombardment of ions, are used to deposit elemental semiconductor material on a substrate.

A passage for surplus water to flow over or around a dam.

Pertaining to rain, or more broadly, to precipitation.

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

Lifeboat stations

A flat bottomed, blunt nosed dinghy (or small boat).

A nationally recognized energy rating program that gives builders, mortgage lenders, secondary lending markets, homeowners, sellers, and buyers a precise evaluation of energy losing deficiency's in homes. Builders can use this system to gauge the energy q ...

The tendency in a boat to keep an upright position or to return to it when careened over.

A precipitation amount of less than 0.005 inches. Also, the record made by any self-registering instrument.

Infrared or radiant heat.

A term which means in the meantime. See 'interim bonus' and 'interim.