The Depth Under Keel, needs to be recallibrated!
I press the depth under keel and it says "depth under keel is 35 meters"
So i dive to 25 meters and CRASH.... i hit bottom, 2% hull damage.
Press depth button again and "depth uner keel is 15 meters"
LOL.... how can it be 15 meters..... i just hit the bottom?