A power supply which achieves its output regulation by means of one or more active power handling devices which are alternately placed in the "off" or "on" states. It is more efficient than linear supplies which vary the conduction of power devices to ach ...

Category:Meteorology

A rotating fitting used to keep a line from tangling.

Category:Sea Words

Refers to the total weight of allowable lifting capacity of heavy cargo, together with the mass of the sub-hook (or fittings) under design working conditions. For the crane with variable-luffing, the safe working load is defined based on the luffing capac ...

Category:Technical Terms

SWS

Smooth Water Services.

Category:Abbreviations

Marks of identification.

Category:Sea Words

A motorlike device containing a rotor and a stator and capable of converting an angular position into an electrical signal, or an electrical signal into an angular position. When several synchros are correctly connected, all of the rotors will align thems ...

Category:Meteorology

Having a specific relationship to a time base or clock. In synchronous communications, data characters are sent according to a timing signal which synchronizes the two communicating devices.

Category:Meteorology

An electrical generator that runs at a constant speed and draws its excitation from a power source external or independent of the load or transmission network it is supplying.

Category:Energy Terms

An electrical inverter that inverts direct current electricity to alternating current electricity, and that uses another alternating current source, such as an electric power transmission and distribution network (grid), for voltage and frequency referenc ...

Category:Energy Terms

A type of motor designed to operate precisely at the synchronous speed with no slip in the full-load speeds (rpm).

Category:Energy Terms

In general, pertaining to or affording an overall view. In meteorology, this term has become somewhat specialized in referring to the use of meteorological data obtained simultaneously over a wide area for the purpose of obtaining a comprehensive and near ...

Category:Meteorology

A surface weather observation, made at periodic times, of sky cover, state of the sky, cloud height, atmospheric pressure reduced to sea level, temperature, dew point, wind speed and direction. amount of precipitation, hydrometeors and lithometeors. and s ...

Category:Meteorology

A lubricating oil made with synthetic base stocks.

Category:Sea Words

System

Category:Abbreviations