A set of drawings showing external openings (cargo hatchways, small hatches, ventilators, air pipes, side scuttles and windows, weathertight doors, scuppers and sanitary discharges, sea inlets and outlets) and details of their closing appliances.

The rate of change of velocity experienced by the occupants during launching of a free-fall lifeboat.

The greatest launching height for which the lifeboat is to be approved, measured from the still water surface to the lowest point on the lifeboat when the lifeboat is in the launch configuration.

A method of launching a survival craft whereby the craft with its complement of persons and equipment on board is released and allowed to fall into the sea without any restraining apparatus, (SOLAS, Chapter III).

A lifeboat constructed for free-fall launching. The certificate of approval for a free-fall lifeboat shall state free-fall certification height, required launching ramp length, and launching ramp angle for the free-fall certification height.

The unrestricted fall of liquid into a tank.

An opening in the lower portion of a bulwark which allows water shipped on deck to run freely overboard.

Freezing is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point.

A temperature at which a liquid solidifies under controlled conditions.

A sum of money paid for the hire of a ship or for carrying goods by sea.

CONTENTIN has been built at the Aker, Helsinki shipyard for UK/France service. The large superstructure at the fore end of the upper deck contains 121 two-berth cabins with en-suite facilities for drivers, together with dining and leisure services.

A halogenated hydrocarbon usually given a number which is related to its chemical formula. It is used as a refrigerant.

Frequency is the number of occurrences of a repeating event per unit of time.

An electromechanical device that converts alternating current of one frequency to alternating current of another frequency.

A frequency counter is an electronic instrument, or component of one, that is used for measuring frequency.

In physics, electronics, control systems engineering, and statistics, the frequency domain refers to the analysis of mathematical functions or signals with respect to frequency, rather than time.

Greater loads physically slow the rotors of a grid's synchronized generators.

The frequency-response reserve (also known as regulating reserve) is provided as an automatic reaction to a loss in supply.

Fresh water is any naturally occurring water except seawater and brackish water. Fresh water is generally characterized by having low concentrations of dissolved salts and other total dissolved solids.

A unit used for conversion of sea, well or effluent water into freshwater by vacuum distillation based on evaporation and condensation.