Again, after 3-5/1943 Hedgehogs, aircraft carriers, better and better radar, lots more ASW vessels, more bases including the Azores which closed the gap in the Atlantic sea lanes, intense pressure from superior officers,including Churchill and Roosevelt to stop the losses, reasoned tactics applied by experienced and talented naval officers, Admiral King getting his head out of his ass and finally understanding that the U-boats were a real problem and not just an irritation made sonar less and less important. The subs could be completely invisible to sonar and the losses would be about the same.
This, of course, would change with the nuclear subs that never needed to surface.
__________________
Irish1958
|