Everyday food routines as clues to naval service experience

What everyday details might help probe a claim of Royal Navy service?

The suggestion is to ask about curry night and 'scran', without treating the answer as proof of service.

Curry night and 'scran' are suggested as subjects to ask about when discussing claimed Royal Navy service. The reasoning is that someone can research ship specifications more readily than the everyday food routines remembered by a crew. This is an informal suggestion, with no basis given for treating it as a reliable authentication test.