Ultra's Multi-Static Active Sonar comprises a field of transmit and receive sonobuoys and the necessary processing to detect and track targets without overloading the operator
Nice, but anything that emits active sonar pings will light up like a Christmas tree for the submarine's sonar operator. If they can hear a ship's propeller from 20 miles away, they certainly can hear a sonobuoy screaming its ass off. Any sub captain with a desire to survive will either dive or run away.
