It generate some more questions like:
When did Helicopters get their own torpedo and I found this interesting article
Quote:
The first Sikorsky R-4 naval helicopter was inducted in 1943. Thereafter, it began the trials for ‘evaluation of the ship-based helicopter in antisubmarine warfare. In the anti-submarine role it was thought that once the sonar of a destroyer detected a submarine the helicopter would be guided to the submarines location and would drop a MK IX 200-pound depth charge, thereafter, it would be replenished from the destroyer.
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https://www.spsnavalforces.com/story/?id=266
Markus