Welcome aboard, JMaxey!
The deeper you go, less chance to get caught by sonar.
In rough weather, near the surface you are difficult to detect. But, be careful no to broach.
When near escorts keep speed down to 2 kts. or less.
If you have been detected, spped one knot.
Visit my Kielman webbie for detailed tactics. For entertainment read my book.
Gute Jagd.
Brag.