Cargo tanks of a chemical tanker are required to be provided with venting systems to prevent both over and under pressurisation of the tank.

After the seal has been in service for some time, the rubber loses some of its elasticity and has a permanent groove visible on the sealing face, measured in mm.

The final stage in bulk liquid pumping from a tank or pipeline. To achieve this, it is often necessary to list the ship to avoid suction loss.

The electrical motor of the novel type. It promises high powers at relatively low weights. However, it always requires a converter.

Annual, intermediate and special surveys. The purpose of the annual and intermediate surveys is to confirm that the general condition of the vessel is maintained at a satisfactory level.

The liquid-tight shell designed to be the prime container of the cargo and includes all such containers whether or not associated with insulation or secondary barriers or both, (IGC Code).

The time necessary for one complete double oscillation or roll of a ship as from port to starboard and back to port.

The new industry guidance contained in the IMO Resolution MSC.215(82) provides requirements for protective coatings in dedicated seawater ballast tanks in all types of ships and double-side spaces of bulk carriers.

Inerting is done by supplying an inert gas to cargo tanks and associated piping in order to prevent explosions during cargo handling operations.

Gas-freeing consists of series of operations in which cargo vapour is replaced with inert gas which in turn is purged with air to prevent explosion hazard.

The liquid-tight shell designed to contain the cargo.

Spaces used for cargo, cargo oil tanks, tanks for other liquid cargo and trunks to such spaces, (SOLAS).

As built documentation of cargo spaces. It should consist of the following documents: 1. Cargo space general description

The certificate required to be carried on board of cargo ships of 300 gross tonnage and over. A Record of Equipment for the Cargo Ship Safety Radio Certificate (Form R) shall be permanently attached.

The certificate required to be carried on board of cargo ships of 500 gross tonnage and over. A Record of Equipment for the Cargo Ship Safety Equipment Certificate (Form E) shall be permanently attached.

The certificate required to be carried on board of cargo ships of 500 gross tonnage and over.

A seawater- and oil-resistant rubber compound used for sterntube lip seals.

The patented hull form developed by Nigel Gee and Associates Ltd.

Fish living above the bottom levels, predominantly such as herring and mackerel.

The pelagic freezer stern trawler AFRIKA is designed to operate in the tropics, fishing mainly for sardinella and horse mackerel.