The fluid, liquid (water or water/antifreeze solution) or air, used to absorb solar energy and transfer it for direct use, indirect heating of interior air or domestic water, and/or to a heat storage medium.

The angle that a solar collector is positioned from horizontal.

Type of bulk carrier built for the carriage of coal.

Vessel used for transporting coal.

A watertight bulkhead at the forepeak extending to main deck. This bulkhead prevents the entire ship from being flooded in case of a collision.

A large square of heavy canvas fitted with lines to allow it to be drawn under the hull of a ship where it is damaged. The pressure of the seawater holds it tight against the ship and greatly reduces the inflow of water.

A measure of the ability of a light source to show colors, based on a color rendering index.

A measure of light quality. The maximum CRI value of 100 is given to natural daylight and incandescent lighting. The closer a lamp's CRI rating is to 100, the better its ability to show true colors to the human eye.

A measure of the quality of a light source by expressing the color appearance correlated with a black body.

An estimate of the temperature of an incandescent body, determined by observing the wavelength at which it is emitting with peak intensity (its color) and using that wavelength in Wien's law.

National flag or insignia flown by a ship at sea.

The national ensign.

Collision RegulationsInternational Convention on Collision Regulations (IMO)

Convention on International Regulations for Preventing Collisions at Sea.

Collision Regulations (IMO)

Collision Regulations(IMO).International Regulations for the Prevention of Collisions at Sea.

Convention on International Regulations for Preventing Collisions at Sea; Rules of the Road. Internationally accepted rules by which vessels at sea must keep clear of each other.

Committee on Measurement Accountability

Combination

A direct-vision nephoscope which is constructed in the following manner: a comb consisting of a crosspiece containing equispaced vertical rods is attached to one end of a column eight to ten feet long and is supported on a mounting that is free to rotate ...