Off New York.
Centre to Nimrod, "What is your aircraft type?"
"CS type is Nimrod."
"What's a Nimrod?"
"It is the UK state-of-the-art ASW aircraft Sir, similar to a PŁ but better."
Meanwhile another aircraft returns to the freq having missed the reply.
"Say again, what is a Nimrod?"
Centre replied:
""It is the UK state-of-the-art ASW aircraft - dummy."
I should mention that was a LONG time ago.