Decca Navigator System
Videos
The Decca Navigator System was a hyperbolic radio navigation system that allowed ships and aircraft to determine their position by using radio signals from a dedicated system of static radio transmitt
The display panel of a Decca Navigator Mk 12 (ca. 1962). Decca position coordinates were directly displayed by four decometers and these were plotted on a conventional chart that had been over-printed with Decca lattices.
Decca Navigator Mk. 21, with the Decometer dials prominent.
Decca receiver, Mk.51 seen in the National Museum of Scotland
An ap Decca receiver Mk II from the 1980s that could be purchased instead of leased. It could store 25 waypoints.
Loran-C
Videos
Loran-C is a hyperbolic radio navigation system that allows a receiver to determine its position by listening to low frequency radio signals that are transmitted by fixed land-based radio beacons. Lor
Decca Navigator System
…displays. The system was deployed extensively in the North Sea and was used by helicopters operating to oil platforms. The opening of the more accurate Loran-C system to civilian use in 1974 offered stiff competition, but Decca was well established by this time and continued operations to 2000. Decca Navigator…
A Loran-C receiver for use on merchant ships
LORAN Station Malone, Malone, Florida Great Lakes chain (GRI 8970)/Southeast U.S. chain (GRI 7980)
Cesium atomic clocks
LORAN transmitter bank