Some years ago I had to divert to refuel our company SK76 at Yeovilton, due to changing plans and bad weather. The company uniform was dark blue trousers, white shirt, dark blue tie and a dark blue formal jacket. I had to go to the ops building to pay. I immediately sensed that the atmosphere in there seemed quite tense and formal, quite unlike that of the RAF I was more used to (having served almost twenty years therein).
It wasn't until later I "twigged" that of course walking in wearing what was almost a replica RN uniform with wings and four gold rings on my sleeves must have put them on "Walt Alert". If I'd thought about it at the time should have broken the ice with a bit of banter...never mind, too late!