(USSR)

Notes: Entering service in 1950, this basic active HF sonar equipped a wide variety of Soviet warships. It was a searchlight-style sonar and completely manual. The operator had to manually train the transducer and press a button for each individual ping. There was no tracking capability and the system was basically little better than WWII German and American systems. Range is 1NM-2NM depending on conditions.

The “Perch Gill” was this set adapted for underwater use on “Zulu” class submarines, according to some sources it was also carried on the prototype “November” class SSN.