oldMohawk, what a coincidence , those 3 pics where taken by the RAF Review magazine staff who were doing an article on our Squadron in 1950 or 1951, the chap in the bottom pic was 'Paddy' our squadron Photographer, aged about 40 then so now long since gone, I cadged a number of pics of him including that survey pic in my post #43. As I had least to do during the long survey flights (up to 10 hours) it was my job to change the film cartridges in the 2 cameras (one photographing the terrain and one the instruments giving height, position etc...) also had to pass around the coffee and sandwiches during our 'break' (but still surveying ). I have copies of all those pics and the accompanying article in my photo album. It was no joke tramping up and down the fuselage, survey height was 22,000 feet so it was pretty cold and the air was very thin , certainly needed oxygen. That why we worked one day on, one day off. Eric