Rocks & mirror
WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

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181 results

Water-based local fire fighting system

marine

According to SOLAS 2000-Amendments and IMO MSC/Cir. 913 vessels constructed on and after 1st July 2002 have to be provided with type approved fixed water-based local fire-fighting systems in addition to the main system.

Waterjet

marine

A propulsor that consists of a water inlet channel with inlet located in the bottom of the ship, a pump that accelerates the water and a nozzle.

Waterjet propulsion

marine

Waterjet propulsion is often choosen instead of conventional propellers for vessels requiring high speeds, shallow draught, protected propulsion, high manoeuvrability at all speeds, low noise emissions for military applications and low vibration.

Waterline

marine

An imaginary line on a ship side parallel to the base at a particular draft.

Waterplane area

marine

The area of a hull at a particular horizontal plane, i.e. within the waterline.

Watertight

marine

Capable of preventing the passage of water through the structure in either direction with a proper margin of resistance under the pressure due to the maximum head of water which it might have to sustain, (ICLL).

Watertight door

marine

A door which is fitted in a watertight bulkhead and able to open vertically or horizontally. It is operated by a hydraulic mechanism either locally or remotely.

Watertight Integrity Plan

marine

A drawing showing the main and local watertight subdivision as well as internal openings and closing devices thereof.

Wattmeter

energy

A wattmeter is an instrument for measuring the electric power in watts of any given circuit.

Watt-peak

energy

Unit used for the power rating of photovoltaic installations, "one kilowatt-peak" meaning "one kilowatt of peak power".

Wave

marine

The travelling undulation of the surface of a liquid. The wave crest moves as the individual surface particles rise and fall but there is no forward motion of the liquid.

Wave energy converter

energy

A machine that converts wave energy into usable mechanical energy.

Wave farm

energy

A wave farm is a collection of machines in the same location and used for the generation of wave power electricity.

Wave power

energy

Energy that is generated by harnessing the forces from waves.

Wave propagation

energy

Wave propagation is any of the ways in which waves travel.

Wavelength

energy

In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.

Waveslope capacity of the fin stabiliser

marine

The maximum static angle of the heel produced by the fin, expressed in degrees

Wear

marine

The deterioration of a surface due to relative motion between it and another.

Weardown gauge

marine

A depth gauge which is inserted into the stern frame boss and through the sterntube bearing to measure the wear that has occurred in the bearing.

Weather chart facsimile, weatherfax

marine

A device used to receive weather reports.

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