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

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

Said of a vessel when stopped and lying near the wind in heavy weather. See Heave To

(1) The distance that the wind and sea has to travel over open water unimpeded by land; the longer the fetch, generally the higher the waves. (2) Also to reach someplace, especially in adverse conditions. When sailing close-hauled, being able to arrive at ...

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

A document prepared by the captain of a vessel on arriving at port; shows conditions encountered during voyage, generally for the purpose of relieving ship owner of any loss to cargo and shifting responsibility for reimbursement to the insurance company.

Transportation charge advanced by one carrier to another to be collected by the later carrier from the consignor or consignee.

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).

A canvas cover secured over a funnel when not in use. Sailor's headwear, woolen type, capable of covering the ears in cold weather.

A watch tackle (small, handy block and tackle for general use).

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.

The International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978.

To repair, clean or paint the hull.

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

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

To remove or disassemble gear after it is used.

An absolute temperature scale. ((

When all the sails are shaking.

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

Kilograms per square centimeter absolute.