The foremost sail; a triangular shaped foresail forward of the foremast.

After or trailing edge of a sail; the after edge of a fore-and-aft sail and the outer edges of a square sail.

The natural tendency of a sailboat to come up into the wind. The helm must be held over to keep the boat from coming up

A lit navigational aid such as a lighthouse that can be used at night or in poor visibility.

Steel disc, that is dogged down over a porthole to secure against breakage of the glass and to prevent light from showing through.

Sailors' term for an old ship that needed a lot of paint and repairs.

Is a gas that follows the perfect gas laws without deviation. There is no such thing, however it is the basis from which calculations are made and corrections applied.

(1) A nautical instrument, on the arc of which is a finely graduated scale showing degrees and minutes, with adjustable reflectors, etc.; used to find the altitude of heavenly bodies, angular distances, etc. (2) On a steering gear, the rudder quadrant is ...

A small crane that projects over the side of the boat to raise or lower objects (such as smaller boats) from or to the water.

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.

A stream of vapor, gas or liquid coming out fast from a narrow orifice.

Tan work shoes issued to U.S. Maritime Service trainees

Combination minimum pressure valve and check valve.

Mesh is the number of openings in a square inch of screen or sieve. It is equal to the square of the number of strands of metal or plastic screening per lineal inch. Standard US mesh screen # 16 equates to a 1.19 millimeter particle diameter, mesh size #4 ...

As tight as can be pulled by hand.

That part of a shaft or axle that rotates or angularly oscillates in or against a bearing or about which a bearing rotates or angularly oscillates.

Additional thickness of planking on a wooden ship about her waterline to give the vessel more stability.

A pilot with a license stating that they are qualified to guide vessels in a particular area.

Capable of keeping out water.

A ported or closed cover for the end of a filter element.