An irrevocable letter issued for a specific amount; renews itself for the same amount over a given period.

Forty Foot Equivalent Units (Containers).

The condition when a perfect gas is isentropically compressed, and the gas inlet temperature and also the amount of work spent is the same for each stage.

A sail set forward of the foremast on the headstay; a foresail

Sailing vessel with three or more masts. Square rigged on foremast, fore and aft rigged on all others.

A signboard attached to a daybeacon to convey navigational information presenting one of several standard shapes (square, triangle, rectangle) and colors (red, green, orange, yellow, or black). Daymarks usually have reflective material indicating the sha ...

The fitting which connects the boom to the mast.

A tube with a narrow throat (a constriction) that increases the velocity and lowers the pressure of the liquid passing through it, creating a partial vacuum immediately after the constriction in the tube. The vacuum created has a sucking effect, and a ven ...

Direction from which the wind is blowing; an unsailable sector between close hauled headings.

A capacity measurement equal to one-fourth of a barrel.

Compressors of 20 HP or less, generally combined with all the components required to put the into operation.

At a considerable distance.

ACRONYM - National Pipe Thread standard. A description of a specific pipe thread

Assault upon a seaman, by Master, while at sea.

The distance the bow of a boat is forward of another's stern

Atmospheric pressure as measured by a barometer.

A naval rank next below that of admiral.

Ice pack whose limits cannot be seen from ship.

The top point of the line about which the earth rotates.