Drilling with both oil-based mud and synthetic based mud generates waste streams, often referred to as ‘slop mud’ or ‘slop water’, which are produced when an oil/synthetic/diesel-based drilling fluid becomes contaminated with water.

Tanks in an oil tanker used to collect drainings, tank washings and other oily mixtures.

A chute for dumping garbage overboard.

An inclined shipbuilding berth.

To separate from by unshackling a link of chain, e.g. slip an anchor.

1.The difference between the actual distance travelled by a ship and the theoretical distance given by the product of the propeller pitch and the number of revolutions. 2. The inclined way upon which a ship is built and then launched.

A loop of rope or wire which is used for he hoisting of a heavy item. It may also describe a length of wire with a loop at each end.

A SWATH hull form variant produced by Lockheed Martin from USA. A further development of SWATH technology using four (2x2) torpedo-like submerged hulls instead of two.

To rotate about a vertical axis in a horizontal plane.

Any tank that is not totally empty or pressed full.

An opening in a deck to ensure air and light to the compartment below.

A downward-extending, flexible structure used to contain or divide an air cushion.

They are devices for removing the oil from the sea surface, and can be found in many forms. They may be free-floating, vessel mounted, or held by a crane or other means.

A powered boat used to assist the purse seiner.

A deep, vertical, finlike projection on the bottom of a vessel near the stern, installed to support the lower edge of the rudder, to support the propeller shaft for single screw ships, and to support the vessel in a dry dock.

A ship of the same main dimensions, general arrangement, capacity plan and structural design as the first ship in a series.

An inverted U-shaped pipe with unequal legs for conveying liquid over the edge of a container and delivering it at a lower level, utilising atmospheric pressure.

A joint that is welded from one side only.

A type of multi-panel hatch cover in which the panels roll along the coaming and tip into stowage. The panels may be driven by a chain drive or pulled by a wire.

The shell plating with stiffeners and girders below the upper turn of bilge.