Just before they closed on the convoy a Swordfish attacked a surfaced U-Boat, the two bombs caused no damage to the submarine, which returned fire damaging the plane and wounded the Air observer.
The two bombs caused no damage to the submarine. They closed on the convoy a Swordfish. This Swordfish was attacked a surfaced U-Boat. The submarine returned fire. The submarine was damaging the plane. The submarine was wounded the Air observer.