An opening; in solar collectors, the area through which solar radiation is admitted and directed to the absorber.

Continuous longitudinals fastened under the deck.

The largest of the headsails; corresponds to the genoa.

Recreational Boating Safety.

Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.

A mechanical device used for air circulation and to provide cooling.

A line on the compass aligned with the centerline of the vessel that indicates the vessel's compass heading. Since it points to the vessel's bow, it enables a course to be steered by bringing the lubber's line to the point on the compass card which indica ...

The weight of an element or group of elements oxidized or reduced at 100~ efficiency by the passage of a unit quantity of electricity. Usually expressed as grams per coulomb.

An instrument for recording ocean waves. Most recorders are designed for recording wind waves, that is waves of periods up to about 25 seconds, but some are designed to record waves of longer periods such as tsunamis or tides.

A mooring winch with the additional ability to haul or render a mooring rope within selectable limits without direct human intervention.

The weight by which a shipment is less than the minimum weight.

The weight prescribed by agreement between carrier and shipper for goods shipped in certain packages or in a certain number.

Referring to alterations in the environment due to the presence or activities of humans.

A commission issued, licensing the commander of a privately owned ship to cruise in search of enemy merchant vessels. see Privateer.

The error in a compass reading caused by the heel of a boat.

Type

Describes the reliability of power plants. It refers to the number of hours that a power plant is available to produce power divided by the total hours in a set time period, usually a year.

Office of Naval Research

A person to whom an asset or right is.

The maximum heat output (in Btu per hour) released by a burner with a stable flame and satisfactory combustion.