The bridge used for taking observations, or directing the handling of the ship.

A small crane that projects over the side of the boat to raise or lower objects (such as smaller boats) from or to the water.

A pin placed through the head of a rudder to prevent it from being lost.

Combination minimum pressure valve and check valve.

Measurement ton 40 cubic ft or one cubic meter.Net ton, or short ton 2,000 lbs.Gross ton/long ton 2,240 lbs.Metric ton/kilo ton 2,204.6 lbs.Cubic meter 35.314 cubic ft.

A container fitted with a means of forced air ventilation.

An inspection cover or port in an air receiver tank.

Any person or entity who, in a contract of carriage, undertakes to perform or to procure the performance of carriage by rail, road, sea, air, inland waterway or by a combination of such modes.

A law of chemistry and physics: the rate of diffusion of one substance in another is proportional to the negative gradient of the concentration of the first substance.

Abbreviation for "With Particular Average."

Is a gas that follows the perfect gas laws without deviation. There is no such thing, however it is the basis from which calculations are made and corrections applied.

Is the ratio of the computed isentropic temperature rise to the measured total temperature rise during compression.

Nickname for a ship's cooper.

A depth measuring device.

A lubricating oil made with synthetic base stocks.

In sailing, to be lifted by a wind shift that allows your boat to be lifted closer to the wind where by it allows you to sail a shorter distance to the next mark, buoy or finish line

Alternatively letting the sails draw, then spilling wind so as to keep a vessel more or less in one place until space is available, marking time.

Small staysail located between the foremast and mainmast.

A charge, based on a fixed daily rate.

Time and date for payment of a draft.