The Japs never seem to find me if I drop below a thermal (always seems to be one handy thank goodness) , run at 1 or 2 knots and keep turns to less than 20 degrees.
Silent running doesn't really seem to matter much...but I do it anyway.
If you are trying to get into a convoy or task force stay silent and deep. Your sub can come back to periscope depth very quicky in SH4. In SH3 it was an agonizingly slow process with the targets often passing by,and out of range, before you made it up to shoot.
And if you master the sonar shooting technique..which I have not as yet...you don't even need to come all the way to periscope depth.
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