When our asdic operator got a "ping" on an enemy U-Boat, the action bell would sound and the whole ship's company would close up to action stations. The ship would go full speed over the U-boat and fire ten depth charges in all different directions set to explode at 10 different depths in the water. Then we would go over the top and let go 10 more charges. We had to be going fast or we would blow our own stern off. On board, our depth charges had to be set on safe because if we were torpedoed and the ship was sinking and we were in the water and one charge went off, all people in the water would be killed.