The white froth on the crests of waves.

The array of indicating marks and figure in relation to which the position of an index is observed, i.e. a scale plate on a recorder.

The ratio of a photovoltaic cell's actual power to its power if both current and voltage were at their maxima. A key characteristic in evaluating cell performance.

A heating system, such as a solar water heater or geothermal heatpump, in which the working fluid is heated and used directly; in an open-loop solar system, the domestic water is circulated in the collector loop.

A line used to tighten the leech of a sail, helping to create proper sail shape.

The distance between similar points on successive waves.

In sailing, to be lifted by a wind shift that allows your boat to be lifted closer to the wind where by it allows you to sail a shorter distance to the next mark, buoy or finish line

The transfer of title of a security such as stock from buyer to.

A lighted or unlighted fixed (non-floating) aid to navigation that serves as a signal or indication for guidance or warning. (Lights and daybeacons both constitute "beacons.")

A heat exchanger for recovering heat from flue gases for heating water or air.

(1) A wind shift further forward relative to the boats direction or heading. (2) A bar or angle under a deck the same size as deck beams. It is used around stair openings in deck, small hatch openings, or at dead end of longitudinals.

The binding of an adsorbate to the surface of a solid by forces whose energy levels approximate those of a chemical bond. Contrast with physisorption.

Failure to make payment on a loan obligation on the due.

The theory that certain days of the week, weeks of the month, and months of the year are more.

The water volume within a specified portion of a stream channel.

The action of letting go the sheets of a sailing vessel, thus spilling the wind and reducing the forward motion of the boat.

A container fitted with a means of forced air ventilation.

A wooden enclosure about sixteen feet square and eight feet high with a precipitation gauge at its center. The function of the fence is to minimize eddies around the gauge and thus insure a catch that is representative of the actual rainfall or snowfall.

The part of a rotating element that counteracts any inherent thrust developed by the impellers.

(AAII)An association based in Chicago whose purpose is to provide information and education regarding.