Forgot two points...
 

Saw just 5 youtube movies on the sh3 forum.

There was told the following that has to be made in shv.

- destroyers went out of fuel and or out of ammo so they had to
give up and had to go back to their base after chasing uboats.

That are 2 good points i thought.

this behavior is already modeled in SH3/4 depending on the realism setting.

DDs will run out of ammo, as for fuel... :hmmm:

Ive been pinned down in SH4 before and the DD's ran out of cans, yet they stayed around for a long long time seemed like days.

Eventually I was running out of air and had to come up.

Evidently they dont accept surrenders either.

Just took a look at one of the DD's in SH4. They have unlimited range/fuel! This is due to the lack of the Ranges array that are present in the submarine sim files. I really do hope that this is something that is changed. But this could be like this for a reason. Imagine if all the AI ships ran out of fuel and were stranded in the middle of the ocean!