ok Marko, thats interesting, well at least your issue is related to the sinking of a ship and thats exactly the issue I have as well...I can conceed that the Commander fix i suggested, although it appears to have fixed my issue, may not be the cause, and that's ok for now...but I at least want to know if more peole have crashes specifically due to ship sinking....
regarding mods, I have had many heavy mods installed and when the game is woking fine , there is never a save crash, and as stated earlier, when the game is working I can save in the middle of a batlle and at depths...but when the game is not workin (ie after I have sunk a ship), then no amount of fussing around will result in a good save.....