Flight-Lieutenant David Ernest Hornell, R.C.A.F. 162 Squadron, was captain and first pilot of a twin-engined amphibian aircraft engaged on an anti-submarine patrol in northern waters. The patrol had lasted some hours when a fully surfaced U-boat was sighted,
traveling at high speed on the port beam. Flight-Lieutenant Hornell at once turned to attack.
The U-boat altered course. The aircraft had been seen and there could be no surprise. The U-boat opened up with anti-aircraft fire which became increasingly fierce and accurate. At a range of 1,200 yards, the front guns of the aircraft replied; then its starboard gun jammed, leaving only one gun effective. Hits were obtained on and around the conning tower of the U-boat, but the aircraft itself was hit, two large holes appearing in the starboard wing.
Ignoring the enemy fire, Flight Lieutenant Hornell carefully maneuvered for the attack. Oil was pouring from his engine which was, by this time, on fire, as was the starboard wing; and the petrol tanks were endangered. Meanwhile, the aircraft was hit again and again by the U-boat's guns. Holed in many places, it was vibrating violently and very difficult to control.
Nevertheless, the captain decided to press home his attack, knowing that with every moment the chances of escape for him and his gallant crew would grow more slender. He brought his aircraft down very low and released his depth charges in a perfect straddle. The bow of the U-boat was lifted out of the water. It sank and the crew were seen in the sea.
