The submarine had submerged, but Samuel S. Miles made sonar contact and fired two Hedgehog patterns. The second pattern produced two underwater explosions which Steeles sonar equipment picked up and a third explosion so violent that it damaged some of Miles''' sonar and radar.
The submarine submerged, but Samuel S. Miles initiated sonar contact and fired two Hedgehog patterns. The second pattern triggered two underwater explosions which Steeles's sonar equipment detected, and a third explosion so powerful that it damaged some of Miles's sonar and radar.