My mother in her youth spent a lot of time on business trips, which for the most part were on the ships of our Navy, even then the USSR
It is clear that from time to time they had ridiculous situations related to communication with the officers.
One of them is definitely worthy of this site.
Once at a party, an officer began to stick to her friend, who for solidity began telling that he, he says, was not just an officer, but had once worked as an illegal scout abroad.
But to the question that he probably knows fluently foreign languages, he quite seriously replied: "No, I worked as a deaf-mute ..."
Never before had Stirlitz been so close to failure ...