Harrier GR3 3(F) Sqn RAF Gutersloh Summer 1989 

The Ferranti Internal navigation system was very advanced for the time (that said the US Navy in the Viking had similar capabilities in the late 1960s!). The system took a bit of time to warm up (as it was 1970's electronics). The rule, however, was if the system showed the pilot they were within a few miles of where the pilot thought they should be then it was correct, but if it was miles out, then the pilot was correct. Who knows with the threat to GPS spoofing etc we may end back up at internal navigation systems.

The moving map display on the Tornado GR1 and early GR4s were a roll of microfiche film with a lightbulb shining through it. As the jet flew along the roll of film would spool. Like a cinema projector. Part of the jets route was flying over an obvious landmark like a lake or reservoir, so that the aircrew could do a “planned fix” where they would readjust the moving map for any drift or error, by manually slewing it back to the correct location.

It had it from the early 1970s. It had been developed for TSR2 in the 1960s.

Didn’t the F111 have a moving map display also ?

I flew them in 1975-79 on 20(AC) Sqn and 3(F) Sqn. We had a few Kiwi pilots who came to join the RAF and who were on Harrier - Arthur Gatland, Harry Karl and Ross Boyens were the ones I knew. I don't know where Arthur and Harry went but I think Ross is still here in the UK. I wonder if your GR3 is in my logbook. What's the airframe number?

@@angusmcangus7914 XZ129.. 👍🇳🇿

Steve Austin I think it's his accent

He's a New Zealander. ;-)

@@Keyswiz71 Yes, he speaks English PROPERLY ;) ;) :D :D Let me know if you would like a translation

They were called HES = Hardened Equipment Shelter , HAS = Hardened Aircraft Shelter. Spent 6 years on Harrier with No 1F in early 70's. Early Harriers did not have moving map displays they arrived about 1970.

HES was usually the Ops bunker, Comcen or one of the Engineering buildings.