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Encyclopedia of Marine Technology


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A kitchen on a ship. The galley and the messroom are usually on the same deck. It is ideal to have provision stores at the same level. If this is not possible, direct stairs should connect the galley and provision stores.


Coating metal parts with zinc for protection against rusting.


1. A narrow portable platform used as a passage by persons entering or leaving a vessel moored alongside a pier or quay. 2. A raised walkway between superstructures such as the forecastle and the bridge or between the bridge and the poop.


Garbage means all kinds of victual, domestic and operational wastes generated during the normal operation of a ship and liable to be disposed of on regular basis or periodically. It does not include fresh fish and parts thereof or sewage.

Garbage collection craft BATELLO ECOLOGICO

The Italian Ministry of Environment ordered 30 fast boats for removing rubbish and floating debris from protected coastal areas. The first craft was delivered in 2003.

Garbage Management Plan

All ships of tonnage 100 gross or above as well as every ship which is certified to carry 15 persons or more, must have a Garbage Management Plan.

Garbage processing equipment

Incinerators, compactors, communiters or other devices for shipboard garbage processing.

Garbage Record Book

Ships with a Garbage Management Plan are also required to have a Garbage Record Book on board in a place where it can be easily inspected.

Gas carrier cargo handling

Typical operation cycle of most refrigerated type liquefied gas carriers includes drying, inerting, cooling down, preparation work prior to loading, loading, laden voyage, unloading, ballast voyage, stripping, warming up and gas freeing.

Gas carrier standards

The design standards defined by the International Gas Carrier Code (IGC Code).

Gas carrier types

Gases can be liquefied by using one of the following methods: 1. Pressurization under normal temperature. 2. Refrigeration and pressurization. 3. Refrigeration under atmospheric temperature.

Gas carrier, gas tanker

Gas carriers are tankers intended to carry different liquefied gases used for energy purposes (petroleum gases, natural gases), in the chemical industry or used as a raw material for making agricultural fertiliser (ammonia).

Gas cylinder

Bottle of the capacity up to 150 liters, charged with gases in special filling stations.

Gas engine

A gas engine is an internal combustion engine which uses blast furnace gas, producer gas, natural gas and others as fuel.

Gas free

A tank, compartment or container is gas free when sufficient fresh air has been introduced into it to lower the level of any flammable, toxic, or inert gas to the level required for a specific purpose, e.g. hot work, entry, etc.

Gas freeing

The procedure of removing dangerous and explosive gases from the interior of tanks (usually vapours originating in the cargo of oil tankers and chemical carriers).

Gas indicators

Portable instruments for measuring the concentration of hydrocarbon gas in inerted and non-inerted atmospheres, of other toxic gases and oxygen.

Gas processing

Separation of oil and gas involving removal of impurities and gas condensate from natural gas.

Gas Reformer

Wärtsilä GasReformer is the solution for utilising gaseous fuels that either contain large amounts of heavier hydrocarbons or vary in their composition.


CLIPPER VIKING is an ice-strengthened gas tanker type 2G, designed to carry ethylene, vinyl chloride monomer (VCM), ammonia, propylene oxide, propane, butane and other liquefied gases.

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