During the second war a Merchant ship was seconded to the Royal Navy for clandestine purposes.
I can't remember much but what stuck in my mind was all the naval officers thought it was quite a hoot and persisted in calling the repurposed cabins/staterooms by their original titles i.e. First Class Passenger's lounge or Cocktail lounge instead of the now, Naval terms e.g. Wardroom etc. etc.
The Captain, a bit of a Martinet insisted on full naval discipline and correct procedure, and had all the old civilian names, above the doors, taken down and replaced by the correct terminology and generally 'tightened up ship' much to the younger officers displeasure.
I saw most of the old Ealing/Boulting Brothers era comedies (remember "The Baby and the Battleship", on last week? The saying "Pipe, sir?" "Pipe!" became quite a widely used phrase for a while!) bur this one passed me by I think, Brumas.
A story on similar lines which Brumas, at least, will appreciate.
When I was a training supervisor at RAF Halton we had a ex-RAF guy who had applied to re-join. I was tasked with assessing him to see what training updating he needed and what rank he should come back as.
I was most punctilious about calling him Mr Parker throughout his visit.
He was re-enlisted and some eight years later he was posted as a junior airman to my section at the base in Norfolk I had by then moved to.
For four years I invariably addressed him as "Mr Parker" much to his amusement, and to the anger and frustration of of the hierarchy!
Then they ask why I didn't get promoted for 25 years!