A vessel's position determined by observation and navigational data.

Where the water and sky or ground and sky appear to intersect.

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

Said of a man who goes to sea as a rating compared with officers, and lives forward. Forward of a mast.

A dinghy or raft that can be inflated for use or deflated for easy stowage.

(1) A line by which the end of a spar is hoisted or lowered. (2) A line that holds up the boom when it is not being used. (3) A line from the upper mast which controls the height of the spinnaker pole.

It is the weight of the column of air existing above the earths surface at 45

To reach the end; to bring one object hard up against another, as when two blocks in a block and tackle arrangement are brought together.

The volume of a substance passing a point per unit time (e.g., meters per second, gallons per hour, etc.).

A method of payment for goods in which cash is paid at the time of order and the transaction becomes binding on both buyer and seller.

A ring-shaped fitting into which the rudder pintle is inserted which allows the rudder to pivot.

To spin out of control and capsize or nearly capsize; The turning of a boat broadside to the wind or waves, subjecting it to possible capsizing; a turning or swinging of the boat that puts the beam of the boat against the waves, creating a danger of swamp ...

Shipped under rate that includes cost from end of ship's tackle at load port to end of ship's tackle at discharge port.

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

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

A pair of additional backstays temporarily rigged to provide extra support to the masts of square rigged vessels when sailing downwind.

A label required on shipments of flammable articles.

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

Area of high barometric pressure where the wind circulates clockwise in the Northern Hemisphere, and counter-clockwise in the Southern Hemisphere. These are fair weather systems with light or moderate winds.

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.