Originally Posted by
pr00ne
Not mistaken at all, they had 9 E1’s in the Airfield Calibration role until replaced by Andovers in 1977.
I remember one of them in about '76 or '77 calibrating the first ever digital D/F to be installed at an MOD airfield replacing the CADF at Farnborough; they were still passing us class 'A' bearings from overhead Wyton.