Love to know how you got on when it came to it.
As a matter of interest, there was once a book I read called:
"We joined the Navy"
which was a total hoot. I remember the bit about the AIB, where the panel were discussing the candidate....
'Not too clever, not much initiative, good sense of humour - should do well....PASS!'
Anyway, again, good luck. If you want to be really daring, talk about the Nelson Touch!