There is also a bug I have found relating to using sonar.
After sinking an Otori-class patrol boat, pointing the hydrophone at the bearing of its wreck will cause the game to crash to desktop.
Here's a screenshot that shows sunken ship in question. This was right before I reproduced the bug.
It also happened on another occasion before this. I'm not sure if it was mentioned in the previous patches. So sorry if it's been found.
