Wasn't there once a department called 'Navigation Flight Services' who used to look after such things? I guess that's gone as well now....
After the 137 MHz fiasco (MoD had somehow missed the worldwide change from 118-136 to 118-137 MHz for VHF comms......
), I rang a chap at the Wyton IPT to ask how the FM-immunity compliant navigation and VHF comms systems were coming along for a certain 4-jet fleet.....
He'd never heard about the legislation due in less than 9 months time and it had only been on the cards for about 20 years. It seems that a 'not in my tour' predecessor had buried it in a file somewhere. So I faxed him a copy of an article in
Pilot - this was the first written requirement he'd ever seen. Predictably he was less than pleased; I believe we had a few expensive diversions in the first few months of the mandatory compliance period from non FM-immune fitted aircraft unable to make IFR approaches at certain aerodromes.
Yet our Flying Club aircraft all had FM-immune VHF radios and nav receivers before the deadline
.