To remove or disassemble gear after it is used.

Navigation and Inspection Circular (US Coast Guard)

Gross tonnage is the basis on which manning rules and safety regulations are applied, and registration fees are reckoned. Port fees are also often reckoned on the basis of GT and NT. GT and NT are defined according to formulas which take account, among ot ...

A small portable compass.

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.

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.

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.

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

A fabric, usually synthetic, used to make sails.

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 boat is double banked, when two oars, one opposite the other, are pulled by men seated on the same thwart.

To windward, in the direction of the eye of the wind; toward the wind; in the direction from which the wind is coming

To stand at the mast and pull down on a halyard as another crewmate winches it in.

To leave a ship without authority (deserting).

A naval rank next below that of lieutenant-commander, which is next below that of captain (the equivalent of commander).

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

Sling of various types used for lifting vehicles on to and off general cargo ship.s

A warning from aloft (heads up).

When the water has large or breaking waves in stormy conditions.

Equipment used for serving meals.