slast,
Steve... ROFLMAO re the VOAP....
Thanks for the other info too.... so I was wrong, and it was indeed paper at the time. (Love the perforations...)
dixi188,
The Doppler of course was "dead-reckoning" and "self-contained" if indeed less accurate than INS or nowadays GPS.
Decca would provide a "true position", but IIRC, by that time Decca coverage (being ground-based) was totally inadequate for the typical BEA route structure.
Looking forward to more info.
CJ