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Originally intended for use as an aerodrome beacon, it was also widely used in marine lighthouses. Depending on the type of bulb installed, the beam could be seen for 18 to 26 nautical miles (33 to 48 km). The unit consists of a 25-inch aluminum housing with a parabolic reflector. An electric motor and gearbox drives the optical unit's rotation.
The VRB-25 is a lighthouse optical system designed and built by Vega Industries Ltd. in Porirua, New Zealand. It was originally designed in 1993–95 with the assistance of the United States Coast Guard to meet USCG requirements for a robust mechanism requiring minimum maintenance. It has become the Coast Guard's standard 12 volt rotating ...
Lampchanger in the Maughold Head Lighthouse, Isle of Man.This is a model NALC-89, produced by Nav-Aids Systems, LTD, in Kent, England. An automatic lamp changer (or lampchanger) is a device used to ensure that a navigational light such as a marine lighthouse or aero beacon stays lit even if a bulb burns out.
The last visual airway beacon was supposedly shut down in 1973, [12] but a few airway beacons are still operating in Portland, Oregon and Western Montana. [16] Those in Montana are charted on the Great Falls sectional chart. [17] Montana was the last state to officially maintain airway beacons, through the state's Aviation Division.
Barbier, Benard, et Turenne (BBT) was a French company founded in 1862, specializing in the manufacture of spotlights, Fresnel lenses for lighthouses, and lighting systems. [1] It was the world's leading producer of lighthouse beacons from the end of the 19th century onwards. It dissolved in 1982. [2]
The grounds and keeper's house are owned by the town of Cape Elizabeth, while the beacon and fog signal is owned and maintained by the U.S. Coast Guard as a current aid to navigation. It was added to the National Register of Historic Places as Portland Head light (sic) on April 24, 1973, reference number 73000121.