Quote:
Originally Posted by Aras
Very good point. I tried this yesterday, I sit on the bottom (65 m) repaired my damage, rig for silent running ,set course to 10, left the sea floor with 1 knots. however a few minutes later the DD which was hovering on the surface ,started to ping again. Got away securely.
The Year is 1940,Scapa Flow. Terrific Weather, can't see further than 600-700 meters. Lots of DD patrolling there  I wonder why  While heading for the western Cost of England, I Sunk 1 A&B Class with magnetic torpedo 
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I have "laid flat" against the sea floor before with very positive results. Early in the war, it works like a charm. Just hold still and repair damage only. I once had two DDs try to find me for hours. They kept a "tag team" like system in the area . One would try to ping and hear for me while the other would depth charge where they thought I was. However, the area they chose was a few hundred meters away. While timing myself to the depth charges, I slowly crawled away; stopping when the depth charges stop. The other DD began his attack run dropping more depth charges in the area that they thought I was in, so I moved again because the noise from the depth charges disrupt the sonar and the guy on the hydrophones can't decipher anything but the explosions making your escape possible.
At this point my depth under keel was about 2 meters, sometimes just 1. I think I was between 60 to 70 below the surface. Clear weather too. That is another factor too- weather. If the sea above you is rough, that will make the enemy's search for you even more rough.
I hope this bit of story telling helps you out of a close call or two.
Good Luck and Happy Hunting!