A seawater pump which supply the ship fire main when the machinery space pump is not available.

The term used when a vessel runs aground in an area where groundings are so common that the insurer of the ship considers it should not be deemed stranding.

The junction of deck and shell at top of sheer strake.

Connected to earth, or an extended conducting body, e.g. the hull of a ship, which acts as an earth.

Fins fitted ahead of the propeller on both sides of the sternpost to improve the propeller efficiency.

Any gas that absorbs infrared radiation in the atmosphere. Greenhouse gases include, carbon dioxide, methane, nitrous oxide, ozone, chlorofluorocarbons, hydro chlorofluorocarbons, hydro fluorocarbons, perfluorocarbons, sulfur hexafluoride.

A seawater, which travels over the weather deck of a ship without any waves breaking.

Wire ropes which secure a lifeboat against the cradle when it is up on the davits.

Ports in the lakes of Canada and the USA popular for grain, iron ore and coal shipments. In Canada: Port Arthur and Fort William in Lake Superior; Hamilton, Kingston, Toronto and Prescott in Lake Ontario.

Cargo ship developed to carry raw materials and manufactured goods on the Great Lakes. Most of them carry bulk cargoes of grain, iron ore or coal.

A thick oily substance used to reduce friction between two surfaces.

A device consisting of a tripod, one leg of which acts as a rail for a sliding electrode holder. Once positioned and with the arc struck, the device welds automatically until the holder operates a trip at the bottom of the rail.

A separator designed to extract vegetable and animal oils from galley grey wastewater before the water is discharged overboard.

A piping system in which flow is accomplished solely by the difference between the height of the inlet end and the outlet end.

Light perforated platform or walkway built up of metal bars, used for access to machinery.

Small stones, used for making a surface for paths, roads, etc.

The cubic capacity of a cargo hold measured to the shell plating.

Wheat, maize (corn), oats, rye, barley, rice, pulses, seeds and their processed forms. Grain stows at 1.2 – 2.0m3/t. It has a low angle of repose and shifts easily if not properly stowed.

A small, manually-secured hatch fitted to the hatch cover, used during loading of grain cargoes.

Certain types of bulk cargoes may be discharged by means of special grabs. Such grabs are either connected to ship derricks or to shore cranes.