FAA Air Fitter 'I' - what was 'I'?
I recently acquired this photograph, featuring a Leading Air Fitter of the Fleet Air Arm with trade designation 'I'.
I am familiar with 'A' Airframes, 'E' Engines, 'L' Electrical and 'O' Ordnance; as well as later 'F' Fitter and 'R' Rigger. Also, have come across 'funnies' with 'C', 'D' and 'Q', but not until now 'I'.
Any insights welcome!
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