There is a legit point here, I have had engine damage (diesel) that is 100%. I have been holed and lost all my fuel. Not 10nm from Tokyo, but in the Java Sea. In RL they might come and take off the crew (in another sub) then scuttle the boat at the very least.
I have no idea how to do this, but it would be cool to have an outside the game app to help.
You are stuck someplace that you feel is realistic to get home from (honor system, obviously). You save the game there---maybe with a standard part tot he front of the name like "rescue_". Exit.
Run a little app that would open the save, and make you either RTB, or ideally RTB with a forced "transfer to a new boat" dialog.
It would be assumed you were picked up and your boat scuttled.
tater
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