Worst case secanario:
your cousin invites you to his dockyard to see his "boat" in refit.
we scramble all over the aforesaid "boat" inc 'sherwood forest' and the control room plus foreward torpedo space- the only bits we couldn't see were the "Engine space" and one of the "engineering spaces" - due to Lloyds 'radio testing'. - Leave Scotland.
Next thing we know there's a knock at the door
"MR Wormster, this is a warrent to search your premisis - DO NOT ASK QUESTIONS!!"
- Guys in uniforms with a red band round the hat - and a machiene that went "click, click, click" - well several hours later and no "click, click wheeeeee!" they leave.
A phone call back to Scotland "WTF?? we've just had the Snowdrops round - wassup??" - seems as if they lost a 'radio test isotope'
6 months later after the "boat" has left dry dock somebody is sweeping up in the bottom of the dry dock, and Lo and Behold! the "missing" isotope container was found.
some stupid matelot/shoresider had kicked the isotope over the dock edge.
PARANIOIA they has it!
Better to regret something you have done - than to regret something you have not done.