A surface escort can keep a submarine fixed on ASDIC while helicopters deliver depth charges. The ship would no longer need to abandon its detecting position to make every attack itself. Aircraft could return to rearm while replacements arrive, maintaining pressure on the contact. If the submarine surfaces, helicopters armed with rockets could attack before its crew brings the guns into action. In the proposed convoy group, helicopter numbers reduce the demand for several surface escorts to alternate between detection and attack.
Notable Point · 1:32:23-1:34:31
An ASDIC escort holds contact while helicopters attack
Rotating helicopters could deliver repeated attacks while a surface escort preserves ASDIC contact.