I don't get it. I'm using sobers mod list (most current as of 5 March) with his newest wave mod and I still have this problem. My work around is to use TC as it doesn't seem to register after 16x. Trying to create a celestial nav fix literally CANNOT be done unless I'm using TC, even in the best of weather. I have NVIDIA but I don't think that matters. It`s frustrating enough that your navigator can`t do a fix when decks awash.
Using TDW New UI option editor I've changed the time delay between surface/submerge set to 12 seconds, but every 2-3 seconds it still switches back and forth when the sub just barely dips below 6m.
I'm using the Type VIIA, so I was thinking (hoping) that the problem goes away with the later B or C. Any thoughts?