Controlled Airspace and Radar Coverage - 1967
The darker blue 'corridors' show the extent of en route controlled airspace and closely follow the major trunk routes. As IFR navigation was entirely dependent on radio navigation aids (VAR, VOR and NDB) for track guidance, the air routes go from navaid to navaid (shown as small circles on this chart). The 'narrowing' of the controlled airspace corridors near navaids is a function of the navigation tolerances of aircraft flying the routes.
Locations carrying a red dot had an Air Traffic Control or Communications (Flight Service) units. Red underlined locations had a DCA Fire Service unit (locations within the dashed box marked 'SEE ENLARGEMENT' are not shown).
The orange circles indicate the extent of radar coverage, at this time primary radar only, at approximately 40,000 feet. The coverage of the Adelaide radar, located at West Beach airport, is truncated to the east due to the Adelaide hills. The orange dashed circles indicate the computed coverage from proposed additional sensors - but it would be many years before radar coverage at altitude throughout the 'J-curve' would be complete. Click here to see a photo and read more about the radar sensors.
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