over-the-horizon radar
71Ground-controlled interception — (GCI) an air defense tactic whereby one or more radar stations are linked to a command communications center guides interceptor aircraft to an airborne target. This tactic was pioneered by the Royal Air Force during the World War II, although the …
72Shortwave radio — Shortwave can also refer to a shortwave trough meteorology. A solid state, analog shortwave receiver Shortwave radio refers to the upper MF (medium frequency) and all of the HF (high frequency) portion of the radio spectrum, between… …
73Shortwave — radio operates between the frequencies of 3,000 kHz (3.000 MHz) and 30,000 kHz (30.000 MHz) [ Tomislav Stimac, [http://www.vlf.it/frequency/bands.html Definition of frequency bands (VLF, ELF... etc.)] . IK1QFK Home Page (vlf.it).] and came to be… …
74Duga-1 and Duga-2 — Coordinates: 47°04′30″N 31°39′00″E / 47.075000°N 31.650000°E / 47.075000; 31.650000 Duga 1 and Duga 2 …
75Duga-3 (eastern) receiver — Coordinates: 50°53′34.66″N 136°50′12.38″E / 50.8929611°N 136.8367722°E / 50.8929611; 136.8367722 …
76Duga-3 (eastern) transmitter — Coordinates: 50°23′07.98″N 137°19′41.87″E / 50.38555°N 137.3282972°E / 50.38555; 137.3282972 D …
77Duga-3 (western) receiver — Coordinates: 51°38′15.98″N 30°42′10.41″E / 51.6377722°N 30.7028917°E / 51.6377722; 30.7028917 Duga …
78Duga-3 (western) transmitter — Coordinates: 51°18′19.06″N 30°03′57.35″E / 51.3052944°N 30.0659306°E / 51.3052944; 30.0659306 …
79United States Naval Research Laboratory — Naval Research Laboratory Emblem of the NRL Active 1923 present Country …
80Convair F-106 Delta Dart — For the F106 jet engine, see Teledyne F106 F 106 Delta Dart Convair F 106A Delta Dart of the 5th Fighter Interceptor Squadron …
