Really Annoyed said:
"
Yes. You have to be mad to want to spend months on end underwater not seeing any day light."
My older Brother was a submariner aboard HMS Swiftsure for several years in the 90s. Also a member of the Devonport Field Gun team in the early 90s. Currently manages an amateur Rugby team in the North East.
In other words, he's a big tough bloke. And would be happy to discuss allegations of mental instability with anyone, down a dark alleyway round the back of the pub...
Personally I think you have to be mad...etc. But I'm bigger than him!