visibility of lights
1Visibility — In meteorology, visibility is a measure of the distance at which an object or light can be clearly discerned. It is reported within surface weather observations and METAR code either in meters or statute miles, depending upon the country.… …
2surface visibility — Visibility observed from eye level above the ground. It is the distance at which prominent objects are clearly visible during the day and at night with lights of specified luminosity …
3Aircraft landing lights — Landing lights are lights used on aircraft to illuminate the terrain and runway ahead during takeoff and landing.OverviewAlmost all modern aircraft are equipped with landing lights if they are intended and approved for nighttime operations.… …
4Yehudi lights — are lamps placed on the underside of an aircraft to raise luminance, to disguise the aircraft against the background sky. The technique was successfully employed in World War II by RAF Shorts Sunderland aircraft in attacks on U boats.In 1945 a… …
5Driver visibility — In transport, driver visibility is the maximum distance at which the driver of a vehicle can see and identify prominent objects around the vehicle.[1] Visibility is primarily determined by weather conditions (see visibility) and by a vehicle s… …
6Courtesy lights — are used by volunteer firefighters and emergency medical technicians (EMTs) to expedite their drive, in their privately owned vehicles, to their firehouse or EMS Base. Courtesy lights are also used by tow trucks, snow plows and other hazard… …
7North Point Range Lights — Location Off Fort Howard (North Point) on the north shore of the Patapsco River Coordinates 39°11′50″N 76°26′54″W / …
8Runway edge lights — are used to outline the edges of runways during periods of darkness or restricted visibility conditions. These light systems are classified according to the intensity they are capable of producing: High Intensity Runway Lights (HIRL) Medium… …
9Runway End Identification Lights — Runway End Identifier Lights (REIL) are installed at many airports to provide rapid and positive identification of the approach end of a particular runway. The system consists of a pair of synchronized flashing lights located laterally on each… …
10runway-end identification lights — An airport lighting facility in the terminal area navigation system consisting of one flashing white high intensity light installed at each approach end corner of a runway and directed toward the approach zone. These lights, which may be… …
