Very powerful and sophisticated sonar suite... A lot of good if the weapons you use, mortars, missiles, torps, can't reach it. ADCAP is extremely long range, and a perfect submarine tactic is just sitting in front of the ship until it gets into range, no sound, nothing for the sonar to hear. Decoys are no match for the ADCAP's sensor package that has been upgraded 7 times. ASW combat is extremely complicated with things like thermal layers, CZ zones, and whatnot. I think a commander already having to worry about surface ships, aircraft, and whatnot would not be able to handle all of that.