Rolling a vessel, that is slightly ice-bound, so as to break the surface ice around her. May sometimes be done when a vessel is lightly aground, but not ice-bound.

The degree to which all the forces on a boat are symmetrical so the vessel sails with just a slight weather helm.

The course of a vessel after magnetic variation has been considered, but without compensation for magnetic deviation.

A single turn of rope when a rope is coiled down.

A small portable compass.

Intimate mixture of oil and water, generally of a milky or cloudy appearance. Emulsions may be of two types: oil-in water (where water is the continuous phase) and water-in-oil (where water is the discontinuous phase).

To untie.

Cargo landed in excess of the quantity on manifest.

A salt or ester of carbonic acid.

U.S. Customs' automated program under AMS. It allows for electronic reporting of inbound (foreign) cargoes in the U.S.

To go aboard the vessel; to put onboard a vessel.

A support fixed on the front part of a chassis (which is retractable); used to support the front end of a chassis when the tractor has been removed.

A life-threatening condition where there is loss of body heat; the greatest danger for anyone in the water. As the body loses its heat, body functions slow down, and this can quickly lead to death.

To let out a line or sail slowly; to slacken or relieve tension on a line; to take pressure off.

To prevent contact with an object while bringing the ship alongside.2. To push off when making a landing.

Cargo which has been booked but does not arrive in time to be loaded before the vessel sails. See also "Windy Booking."

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.

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

Maintains and monitors radio, sends and receives messages. Often maintains electronic navigation. Latest replaced with certified GO (Deck officer)

A term used to describe the hot gas pressure on the outlet side of the refrigeration compression.