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

Hoisting the ensign at 8 a.m. and down at sunset.

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 ...

Flow of air under specific conditions required at a particular point.

Is the ratio of the polytropic compression energy transferred to the gas to the actual energy transferred to the gas.

A locker big enough to hang clothes.

Alternatively letting the sails draw, then spilling wind so as to keep a vessel more or less in one place until space is available, marking time.

A small local current usually caused by tidal streams as they ebb and flow around or against obstructions.

(1) The rolled up part of a sail, tied with the reef lines, that is used to reduce sail area for heavy winds; To reduce the sail area. (2) A group of rocks or coral generally at a depth shallow enough to present a hazard to navigation.

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

Nautical slang for the spirit of the sea, usually in the form of a sea devil. Davy Jones's Locker is the bottom of the sea, the final resting place of sunken ships, articles lost or thrown overboard, and of men buried at sea.

Official terminology for life jacket. When properly used a PFD will support a person in the water. Also called a life jacket, life preserver or life vest.

An inspection cover or port in an air receiver tank.

Recapitulation of the terms and conditions agreed

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.

A line drawn to indicate both the direction and magnitude of a force, such as leeway or a current.

Succession of long and unbroken waves that are not due to meteorological conditions in the vicinity. Generally due to wind or storms at a distance from the position.

Board, bearing instructions, that comes to a wrecked ship with a life-saving rocket line.

The length of the boat at the waterline.

Packages loaded on a pallet, in a crate or any other way that enables them to be handled at one time as a unit.