A short piece of line spliced into the end of the clapper by which the bell is struck. Traditionally it is finished off with a double wall knot crowned in its end.

Pieces of plank bolted to the outer end of the bowsprit, to reeve the foretopmast stays through.

Sailing with the motor on and in gear

The ratio of the actual water-vapor partial pressure to its saturation pressure at the same temperature. (considered only with atmospheric air).

Imaginary lines drawn through the north and south poles on the globe used to measure distance east and west of the prime meridian at Greenwich, England (designated as 0

A strong tropical revolving storm of force 12 or higher. In the northern hemisphere hurricanes revolve in a clockwise direction. In the southern hemisphere these storms revolve counterclockwise and are known as typhoons.

One which blows across a boat's side

The curved part of a ship's hull where the side and the flat bottom meet.

A gas produced by many fruits and vegetables that accelerates the ripening and aging processes.

A mechanical barometer used to measure air pressure for warnings of changing weather.

Complete encirclement of a cleat, bollard, pin or winch by a line.

The largest circle which can be inscribed on a sphere by a plane that cuts through the center of the sphere. On the earth, the equator is a great circle, as are all the meridians of longitude which pass through both poles. The shortest distance between tw ...

see Watch

Temperature at which condesation first occurs and moisture is formed.

A device which operates compressors in sequence according to a programmed schedule.

Money paid by shipper to Master of ship for diligence in care of cargo. Not now paid to Master, but added to freight. Amount was usually about 1% of freight.

Method of securing a line around a spar by taking the standing part around the spar, then a half hitch around itself and the end tucked three or four times around its own part.

To coil flat down on deck, each fake outside the other, beginning in the middle and all close together.

A propulsion system for boats with an inboard engine operating an exterior drive, with drive shaft, gears, and propeller; also called stern-drive and inboard/outboard.

: Regular ship shaped vessel, production ship. Positioned by anchors or dynamic positioning. Has its own propulsion machinery.