Any of various functions from which intensity or velocity at any point in a field may be calculated. The driving influence of an electrochemical reaction. See also active potential, chemical potential, corrosion potential, critical pitting potential, deco ...

Instrument which measures and records the amount of evaporation over time.

Net Standard Weight

A mooring buoy or spar. A group of piles driven close together and bound with wire cables into a single structure.

Disciplinary code in which maritime crimes and punishments are specified.

A receptacle, open to atmosphere, that is used to used to collect condensate. For example, two or three drain pipes from various filters may be discharging into a funnel. In this case the funnel is a tundish.

A solution or process used to loosen or remove corrosion products such as scale or tarnish.

Hygrometer in which the dew (frost) point is determined by observing the temperature of an artificially cooled surface at the moment at which dew (frost) first appears on it.

Similar to the spectroheliograph, but used for visual instead of photographic purposes.

The change in barometric pressure within a specified period of time (typically 3 hours for meteorological observations).

Scottish Vocational Qualification

The sum of the sensible and latent heat in a substance or fluid above a base point, usually 32 degrees Fahrenheit.

A loss ofstrength and ductility of .steel by high-temperature reaction of absorhcd hydrogen with carbides in the steel resulting in dec arbwri:.alien and internal fissuring.

Freight on which transportation charges are calculated on the basis of volume measurement.

A unit of air cooling capacity; 12,000 Btu per hour.

Two navigational aids separated in distance so that they can be aligned to determine that a boat lies on a certain line. Transits can be used to determine a boat's position or guide it through a channel. Also called a range.

To reeve and secure a line.

For a given locality and month, an empirical expression devised for the purpose of classifying climates numerically on the basis of precipitation and evaporation.

The length of time that a product or appliance is expected to meet a certain level of performance under nominal operating conditions; in a luminaire, the period after which the lumen depreciation and lamp failure is at 70% of its initial value.

Overboard and by the ship's side.