The vertical edge of a square sail.

Related Terms

SPREAD

The divergence of the air stream in a horizontal or vertical plane after it leaves the outlet.

BOLTROPE

A strong rope stitched to edges of a sail

GYROSCOPIC DRIFT

The horizontal rotation of the spin axis of a gyroscope about the vertical axis

HEAVE

The oscillatory vertical rise and fall, due to the entire hull being lifted by the force of the sea. Also called HEAVING

ULF STREAM

A warm, well defined, swift, relatively narrow ocean current which originates where the Florida Current and the Antilles Current meet north of Grand Bahama Island. It gains its impetus from the large volume of water that flows through the Straits of Florida. Near the edge of the Grand Banks of Newfoundland extensions of the Gulf Stream and the Labrador Current continue as the NORTH ATLANTIC CURRENT, which fans outward and widens in a northeastward to eastward flow across the ocean. The Florida Current, the Gulf Stream, and the North Atlantic Current together form the GULF STREAM SYSTEM. Sometimes the entire system is referred to as the Gulf Stream The Gulf Stream forms the western and northwestern part of the general clockwise oceanic circulation of the North Atlantic Ocean.

HEIGHT OF TIDE

Vertical distance from the chart sounding datum to the water surface at any stage of the tide. It is positive if the water level is higher than the chart sounding datum. The vertical distance from the chart sounding datum to a high water datum is called RISE OF TIDE.

HEELING ERROR INSTRUMENT

Heeling adjuster. Also called VERTICAL FORCE INSTRUMENT

MODEL ATMOSPHERE

Any theoretical representation of the atmosphere, particularly of vertical temperature distribution.

FORESAIL

The lowest sail set on the foremast of square-rigged ship

WICKING

The vertical absorption of a liquid into a porous material by capillary forces.

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