[4] The guidance of a Mk37 mod 0 torpedo was done by a gyroscope control during the initial part of its trajectory, where the gyro control achieved a straight run, a passive sonar homing system, and at the last 700 yards (640 m) by a Doppler-enabled active sonar homing, with magnetostrictive transducers operating at 60 kHz.

The efficiency of Mk37 torpedoes was high for targets with speed lower than 20 knots (37 km/h) and depth less than 1,000 ft (300 m).

It entered service in 1983 and is capable of swimming as far as 10 miles[clarification needed] through or into a channel, harbor, shallow water area and other zones which would normally be inaccessible to the vessel laying it.

After reaching the target area it sinks to the sea bed and acts like a conventionally laid influence mine.

The exploder in the Mk 67 warhead is computerised and incorporates magnetic, acoustic and pressure sensors.