Submarine Auto Follow

As this is a 24/7 game and some of us actually do sleep, it would be nice if there was a way to tag a sub or subs to a group of surface ships to follows in an auto follow function. If the ships move in your direction they could come upon you, but will then travel over you if they can't detect ( unless you have your fire control setting, set to attack) and your subs would tag along at some "programmed spacing" amount. This would allow easy tracking of a convoy without engaging, unless of course you get detected.

Just a thought.