A good few times in heavy to medium seas I've moved into the perfect postion and waited on my prey. I've followed their sound contact, raised the periscope to finally fire....and found my boat has drifted a little too deep and all I see is a nice underwater panorama.
I have to go from all stop to at least ahead one third and order periscope depth again, and it seems to take a maddening amount of time to do so!
I've also noticed that when at periscope depth and moving at flank speed your conning tower has a tendency to pop up above the waves and be spotted by alert crews from some 4000 yards
