[Pisces]

When you do a save on open seas it is best to do a hydrophone check to make sure you don't have anything in range. Just do not save submerged. I also move outside of hydrophone range of any contact I know of if I need to save before I can attack. It's annoying to do that trouble. But rather that than botched saves after the hours spend attacking the convoy.

Save often with different names. Fall back on the last save if it ends up being corrupt. Keep going back in previous saves until it works. There is no definite known cause to the crashing saves. So there is no way to look into them and identify what makes them bad to remove them. It might even break your entire patrol save hierarchy. Well, you are not gonna figure it out unless you are a programmer with knowhow and plenty time to hunt that bug. Others failed in that attempt so far.