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).

A type of modulation in which the frequency of a continuous radio carrier wave is varied in accordance with the properties of a second (modulating) wave.

Wind with a speed between 17 and 21 knots (19 and 24 mph); Beaufort scale number 5.

Wind with a speed between 34 and 40 knots (39 and 46 mph); Beaufort scale number 8.

Extra draught allowed by the load line regulations for loading in fresh water.

To veer or haul on a rope, slightly, so that a part subject to nip or chafe is moved away and a fresh part takes its place.

An optical device for concentrating light that is made of concentric rings that are faced at different angles so that light falling on any ring is focused to the same point.

A type of wear that occurs between tight-fitting surfaces subjected to cyclic relative motion of extremely small amplitude. Usually, fretting is accompanied by corrosion, especially of the very fine wear debris.

The accelerated deterioration at the interface between contacting surfaces as the result of corrosion and slight oscillatory movement between the two surfaces; Deterioration at the interface between two contacting surfaces accelerated by relative motion b ...

Surface resistance to relative motion, which slows down movement and causes heat.

The energy lost from the movement of a fluid in a conduit (pipe) due to the disturbances created by the contact of the moving fluid with the surfaces of the conduit, or the additional pressure that a pump must provide to overcome the resistance to fluid f ...

A mutual organisation whose funds, after the deduction of running costs, are owned by its.

Benefits to employees additional to salary. Typical examples would be company cars, expense.

Filter, Regulator and lubricator sometimes combined in one unit

Foreign Vessel

A charge imposed by a management company on a mutual fund or unit trust to cover administration.

Used in meteorology to describe boundaries between hot and cold air masses. This is typically where bad weather is found.

Ice crystal deposits formed by sublimation (conversion of water vapor directly to ice) when temperature and dew point are below freezing.

Is the unique temperature to which the air (or any gas) must be cooled in order that it shall be saturated with respect to ice.

An instrument for measuring the frost point of the atmosphere.