A written agreement between the master of a ship and the crew concerning their employment. It includes rates of pay and capacity of each crewman, the date of commencement of the voyage and its duration.

(1) A small wooden cask in which grog was carried. (2) A type of marine steam reciprocating engine where two engines were used together on the same propeller shaft.

A fix taken by taking bearings of a single object over a period of time. By using the vessel's known course and speed, the location of the vessel can be found.

A bulkhead placed athwartships.

Part of a ship/s side projecting upwards along the line of the weather deck or uppermost deck.

A liquid piston compressor is a rotary compressor in which a vaned rotor revolves in an elliptical casing, with the rotor spaces sealed by a ring of liquid rotating with it inside the casing.

Type of wrench used to tighten or loosen fire hose fittings.

A sailing vessel dead in the water due to lack of wind (not moving).

A draft payable on demand upon presentation.

An astray shipment (a lost shipment that is found) sent to its proper destination without additional charge.

A barge which loads material dumped into it by a dredger and discharges the cargo through the bottom.

Is a process taking place under constant volume. To raise the pressure from state 1 to state 2, heat must be added. The pressure change is proportional to the change in temperature.

The alternate rise and fall of the bow of a vessel proceeding through waves.

Lines drawn on a weather map indicating regions of equal pressure. When the lines are close together, this indicates a rapid change in air pressure, accompanied by strong winds.

A change in the wind direction.

A large net with its mouth held open, towed by a trawler along the bottom to catch bottom fish.

Alert (pep it up!).

Said of the anchor chain when moored and the chain does not lead clear of another chain.

An audible or visual discharge at a pressure slightly lower than the set pressure on a valve. Warns the operator that the valve is about to open.

A term used to cover all of the anchor gear.