Sorry for reviving this.
I believe this is the option THEBERBSTER is referring but unfortunately that actually only changes the depth in which the u-boat dives when you press the deck awash button.
imagem_2023-04-19_050430827.jpg
while i look for it myself if anyone can shed a light on what the correct option is i would really appreciate it.
Just to make it clear what im looking for is the option that changes the depth that the game considers the u-boat to be under water so i can increase it. That way when using the deck awash command or even in rough seas i don't keep losing the binoculars and other things.