History ASW Question

[Harry Buttle]

Originally Posted by Finback

When were sonobuoys first used? :hmm:

(Note: No prizes will be awarded for correct answers. No hazing allowed for incorrect ones).

7 March 42 The practicability of using a radio sonobuoy in aerial anti-submarine warfare was demonstrated in an exercise conducted off New London by the K-5 blimp and the S-20 submarine. The buoy could detect the sound of the submerged submarine's propellers at distances up to three miles, and radio reception aboard the blimp was satisfactory up to five miles.

28 Oct 42. Procurement of the expendable radio sonobuoy for use in antisubmarine warfare; 1,000 sonobuoy's and 100 receivers.

The Sonobuoy was introduced into service in June 43, so first operational use would most likely have been June/July 43