Over the next few months a number of long awaited ship types and weapons start to be introduced. These will contribute significantly to the eventual defeat of the U-Boats.

1. The first Auxiliary Fighter Catapult Ships flying the White Ensign and equipped with a single 'one-way' Hurricane are ready in April 1941. They shoot down their first Kondor in August.

2. The final step in the introduction of ship-borne aircraft into the Battle of the Atlantic comes in June when the first escort carrier is ready for service. HMS Audacity, converted from a German prize, has a short life, but proves the great value of these vessels.

3. New scientific developments also start to play their part. In May the first high definition, 10cm radar (Type 271) is installed in a corvette. This greatly improves a ship's ability to located a U-Boat on the surface, even at night. Later still, high frequency, direction finding sets (HF/DF or 'Huff-Duff') allow ships to locate U-Boats accurately by their radio transmissions