Registered trademark for AUS32 (Aqueous Urea Solution 32.5%) and is used in a process called selective catalytic reduction (SCR) to reduce emissions of oxides of nitrogen from the exhaust of diesel engine motor vehicles.

A section of inclined plating welded to a bulkhead within a cargo hold, commonly in way of corrugations to facilitate the flow of granular material, at the same time providing additional rigidity to the bulkhead.

A covering fitted over the insulation of an electric cable to protect against heat, oil and chemicals. It must also be tough and flexible.

The reduction of rolling provides better fuel/speed performance on rough seas, enhances crew safety and possibly their efficiency. The roll amplitude can be reduced by passive devices, such as bilge keels, or by active devices...

Remotely controlled chain and wire stoppers used onboard AHTS to unshackle lengths of wire on deck when carrying a loaded wire over the stern roller.

Shale gas is defined as natural gas from shale formations. The shale acts as both the source and the reservoir for the natural gas.

Shafts and associated components used for transmission of power.

A watertight enclosure for the propeller shafting large enough to walk in. It extends aft from the engine room to provide access and protection to the shafting in the way of holds.

A turning propeller is electrically insulated from the hull by the lubricating oil film in the bearings. Electrical potential is generated between the shaft and the hull.

A connection between two lengths of the propeller shafting. Most shafts are connected to each other by means of forged flanges.

Bearings which support the intermediate shafting between the tailshaft and the main engine or gearbox.

An alternator driven by the main engine to supply power to the mains. The shaft alternator can be arranged in a number of different ways.

The process of establishing the reference line. The major welding work should be completed on the stern block of the vessel to prevent structural deformation which may result from excessive welding.

A static condition observed at the bearings supporting the propulsion shafts. It is calculated, conducted and verified when the system is at rest.

U-shaped steel forging with a pin through an eye on each leg of the U.

There are three main sewage treatment processes: biological, physico-chemical and electrocatalytic oxidation.

Drainage and other wastes from any form of toilets, urinals, and WC scuppers, drainage from medical premises (dispensary, sick bay, etc.) via wash basins, wash tubs and scuppers located in such premises, (MARPOL 73/78).

A deep tank in the engine room used for pre-cleaning of fuel oils by gravity; a liquid mixture in the settling tank clears slowly as a heavier liquid and solids sink to the bottom under influence of gravity.

A tank supplying clean, treated fuel oil directly to the engine.

Spaces used for galleys, pantries containing cooking appliances, lockers, mail and specie rooms, store-rooms, workshops other than those forming part of the machinery spaces and similar spaces and trunks to such spaces, (SOLAS).