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Encyclopedia of Marine Technology

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Bulk carrier, bulker

A vessel designed to carry dry cargo, loaded into the vessel with no containment other than that of the ship, s boundaries, as distinguished from the liquid bulk carrier or tanker.


The melting of filler metal and base metal (substrate) together, or of base metal only, to produce a weld.


A device that protects an electrical circuit from overcurrent.


Interior of boiler where fuel is burnt.


A smokestack of a vessel.


Harmful gas produced by fires, chemicals, fuel, etc.

Full speed

Highest possible speed of a vessel.

Fuel-water emulsification (FEW)

Invisible smoke technology is based on fuel-water emulsification (FEW), whereby the heavy fuel or diesel oil is homogenised with fresh water before injection into the engine.

Fuel oil tank protection

Old vessels, but unfortunately also many new ones, have bunkers in double hull and any shell damage can result in oil spill. This common practice has been stopped by new revised MARPOL Annex I, Regulation 13A.

Fuel oil transfer system

This system receives and stores fuel and delivers it to settling tanks. Fuel oils are loaded through deck fill connections that have sample connections provided to permit the fuel to be sampled as it is taken aboard.

Fuel viscosity

A measure of resistance of the fuel to flow at a stated temperature. According to ISO, the kinematic viscosity of heavy fuels should be specified in centistokes (cSt = 10-6m2/s) at 100°C.

Fuel oil unit

The equipment used for preparation of oil fuel for delivery to an oil-fired boiler, or equipment used for preparation for delivery of heated oil to an internal combustion engine...

Fuel oil treatment

Fuels supplied to a ship must be treated on board before use in order to remove solid as well as liquid contaminants. The solid contaminants in the fuel are mainly rust, sand, dust and refinery catalysts.

Fuel oil system

Various piping systems, provided for bunkering, storage, transfer, offloading and treatment of fuel oils.

Fuel oil stability

Fuel oils are produced from various crude oils and refinery processes. Due to incompability, such fuels can occasionally tend to be unstable when mixed.

Fuel oil service tank

An oil fuel tank that contains only the required quality of fuel ready for immediate use. Two oil fuel service tanks, for each type of fuel used on board, necessary for propulsion and generator systems, are to be provided.

Fuel oil service system

see fuel oil systems.

Fuel oil

Any oil used as a fuel in connection with the propulsion and auxiliary machinery of the ship.

Fuel Conditioning Module (FCM)

A new automated two-stage fuel oil supply module developed by Alfa Laval.

Fuel cell power pack

A fuel cell power pack consists of a fuel and gas processing system (the balance of plant), and a stack of fuel cells that convert the chemical energy of the fuel to electric power through electrochemical reactions.

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