I was born in and grew up in SD.
There must have been an attractive female or two on the whale watching boat... submariners on those boats were a little bit different... let’s leave it at that. If the boat was on it’s way in and the tourist that was seen through the periscope cute enough, a sailor might be waiting on the dock that afternoon when the ship came back in. The sailor would be carrying the picture of the young lady they took through the scope...
I was informed that such tactics produced mission success with no casualties, both times deployed.
LOL! Having been married to a Navy Man, I’d believe it! :)