Cold Waters Nuclear Submarine game/sim website by PMC.
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See also Towed Array Sonar page in Naval Warfare website by PMC.
If you are closer than 200 feet of the bottom the towed array is retracted, otherwise its deployed.
Towed array sonar is best at 5 knots speed, any slower (all stop?) and the line will sink, any faster and it degrades when above 10 knots its not usable anymore.
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