A short length of shaft with flanges at either end and a thrust collar in the centre.

The product of the propeller thrust and speed of vessel advance.

The complete assembly of thrust shaft and bearings which is solidly constructed and mounted onto a rigid seating.

A bearing located inside the ship to transmit the propeller thrust from the shafting to the hull structure.

Actual throat, the shortest distance between the weld root and the face of a fillet weld.

The time-weighed average concentration of a substance to which workers may be repeatedly exposed, without adverse effect.

The value of input to a measuring instrument, or any system, below which no output change can be detected.

The licensed member of the deck department, in charge of the eight to twelve watch.

Licensed member of the engine department, in charge of the eight to twelve watch. He maintains lighting fittings.

Volatile liquids added to paints to speed up application and to support penetration by lowering the viscosity.

Any plastic material which can be softened under the application of heat or heat and pressure and then hardened by cooling, without any changes in its properties, e.g. polyvinyl chloride (PCV), nylon.

A device which is operated by a rise in temperature. It is used on circuit breakers, relays, etc., and is often a bimetallic strip which deflects when heated.

A lightweight waterproof garment intended to conserve body heat and be worn by persons suffering from exposure to cold temperatures, e.g. a person recovered from the sea.

The ratio of the work done by an engine to the mechanical equivalent of the heat available in fuel.

A valve from which a sample can be drawn for testing or visual examination, e.g. salinometer cock on a boiler or test cock on an oily water separator.

LAMNALCO SANA’A is the high-performance ASD tug built to the RAstar design developed by Robert Allan Ltd., naval architects of Vancouver, B.C.

A person appointed by the terminal or other facility where the ship is being loaded or unloaded.

Any structure used for the assembly, processing, embarking, or disembarking of cargo.

see OFFSHORE PRODUCTION AND STORAGE INSTALLATIONS.

A test to determine the material strength and ductility. A specially-shaped specimen of standard size is gripped in a testing machine and the ends drawn apart.