A double block where the two sheaves lie in a plane one below the other, rather than alongside each other.

A person inexperienced with or uncomfortable around boats.

On vessels constructed of wood, the narrow gap between the planks which form the decks and sides and were caulked to make them watertight. Since wood swells when it's in contact with water, a narrow seam is necessary to allow for the expansion.

Material that stores energy, although mass will also retain coolness. The thermal storage capacity of a material is a measure of the material's ability to absorb and store heat.

A general handyman in the engine room.

Half of a sphere. On the globe hemispheres are used to describe the halves of the earth north or south of the equator.

A float with a flag at the top of a pole. Used to mark a position such as for a mooring, a race or a man overboard.

Measuring point for compressor acceptance test. Pressure at the point of use.

A phrase with a nautical derivation, meaning a man under the influence of drink or unsteadiness through drink.

Abbreviation for "Not Otherwise Indexed By Name."

A flat tray, generally made of wood but occasionally of steel, on which goods particularly those in boxes, cartons or bags, can be stacked. Its purpose is to facilitate the movement of such goods, mainly by the use of forklift trucks.

A device to record temperature in a container while cargo is en route.

Abbreviation for "Please Authorize Delivery Against Guarantee." A request from the consignee to the shipper to allow the carrier or agent to release cargo against a guarantee, either bank or personal. Made when the consignee is unable to produce original ...

In transit, or in passage.

Gallons per minute

The medium or material that does the actual filtering or separating. May be paper, wire mesh, special cellulose, inorganic plastic, or a combination.

A location that is not sheltered from the wind and seas. An open location would not make a good anchorage.

Fine separated particles floating in the air and clouding it. A substance in the gaseous state.

Above sea level

The energy in foot pounds required to compress polytropically and to transfer one pound of a given gas from one pressure level to another.