Very handy.
That being said, the DD's in game can hear you as soon as you go above 1kts. Best way to avoid DD's ( if you use external cam which is a bit cheating) is dive as deep as you can, check their circle (1 or 2 circle, one stationary {listens})
Sneak away out of the circle preferably when they are on the farthest side of the circle behind you, at a steady 1kts speed. .
Do NOT, under no circumstance change speed. That is the surest way to get killed. And, use decoys sparingly.
Unless you know how to hide in their baffles or explosions).
OLtzS ashikaga
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