can i make sinking ships not vanish?

[Kpt. Lehmann]

Originally Posted by Von Manteuffel

Happened to me, too, sank a ship in shallow water; continued the patrol and then at least a day later, running submerged ran into the wreck and severely damaged my boat. I'm not sure how long sunken ships "exist" for, but there is a radius around a sunken target which makes it disappear if you move outside it. I'll have a look at some of the files and see if it is controllable, or - as I suspect - hard-coded.

The current radius in question is 35km IIRC.