Is it just me, or does anybody else find the whole "I was a nimrod hero, we were doing secret things which make us special but can't talk about it" bollocks deeply unprofessional?
Nimrod will never have the credibility of rotary/zoomy, so give it up. What you are doing seems very waltish.
If you can't talk about it, then don't talk about it!
Just because Nimrod will never impress the girls doesn't mean you should big your part up. If you really were doing something "special", then don't be so insecure about it. Rest safe in the knowledge that you did your bit.
I'm sure many different branches have their own "special" secrets, but most are quiet about them. Often the most important part of keeping a secret is hiding the fact that there is a secret....