A ton on which the shipment is freighted. If cargo is rated as weight or measure (W/M), whichever produces the highest revenue will be considered the revenue ton. Weights are based on metric tons and measures are based on cubic meters. RT=1 MT or 1 CBM.

Sea water used for ballast, let into the double bottom, or into a water-ballast tank, or trimming tanks.

Light, bulky articles.

The power that is consumed to overcome the frictional losses when operating in an unloaded condition.

Open Shelter Deck ship.

A boat that has rolled so that she is lying on her side or even rolled completely over (can be caused by a sudden gust or squall). A boat with appropriate ballast should right herself after being knocked down.

Pressure dew point temperature (

The Captain of a vessel. Highest officer aboard ship. Oversees all ship operations. Keeps ships records. Handles accounting and bookkeeping. Takes command of vessel in inclement weather and in crowded or narrow waters. Handles communications.

United Nations EDI for Administration, Commerce and Transport. EDI Standards are developed and supported by the UN for electronic message (data) interchange on an international level.

Freight that has not been called for or picked up by the consignee or owner.

A small tapering flag, which can be used for identification or communication.

The fitting in the bottom of the boat in which the bottom or heel if the mast sits.

A wooden bar which may be shipped in the capstan head for heaving around by hand (to heave up anchor or heavy objects by manpower).

The average level of the oceans, used when finding water depths or land elevations.

see Gybe

To remove or disassemble gear after it is used.

A hand held pneumatic tool. Designed for light demolition work, digging, making holes etc.

An absolute temperature scale. The kelvin unit of thermodynamic temperature, is the fraction 1/273,16 of the thermodynamic temperature of the triple point of water. The triple point of water is the equilibrium temperature (0,01

Navigation and Inspection Circular (US Coast Guard)

Black diamond, ball, and cone shapes hoisted on vessels during the day to indicate restricted movement, ability, or type. For example three balls means aground.