The velocity of the gas in the passages between the filter units in the filter house of a gas filter.

Surrounded by land.

Ship's boat kept ready for immediate lowering while at sea. When used for life-saving, it was called an "accident boat" or lifeboat.

A labyrinth type filter having the active surfaces continuously splashed with oil. Most pollutants are absorbed by the oil which when circulated releases its pollutants, which sink by gravity to the bottom of the oil pan.

The after section of the propeller shaft.

Breaking away of a mass of ice from a glacier or iceberg.

Said of a vessel when caught between ice on both sides.

An analytical method of assessing machine health by quantifying and examining ferrous wear particles suspended in the lubricant or hydraulic fluid.

The vertical pole or spar that supports the boom and sails. a mast on a mechanically propelled vessel holds electronics antennas, lights, etc.

A framing of metal fitted over an opening in a deck, with glass or plexiglass inserted for the admission of light into a cabin, engine room, etc.

Foaming water that rises upward immediately before stem of any craft being propelled through water.

Is pressure as determined by most instruments and gauges.

Capacity of a compressor is the full rated volume of flow of gas compressed and delivered at certain set conditions.

Covers for closing up hatchways.

Isolated rocky peak rising from a sheet of inland ice.

A compressed air coupling commonly used on European rail and road vehicles to connect one vehicle to the next.

See Insurance, Particular Average.

Caulker's name for the seam in the upper deck planking next to a ship's waterways. There was very little space to get at this seam, making it a difficult and awkward job. This is the origin of the expression "Between the devil and the deep blue sea, since ...

The difference between magnetic north and true north, measured as an angle. Magnetic variation is different in different geographic locations, so the nearest compass rose to each location on a chart must be used.

A drawing representing the internal parts of a vessel as if she had been cut straight through, either longitudinally or athwartships. It shows the positions of the frames and their exact curvature in relation to the hull shape.