Sorry that this isn't an update. I wanted to call attention to a History Guy episode about some of the often-unsung heroes of WWII, so if you have a bit over twelve minutes to spare, I recommend his video on the
Sub Chasers of the Civil Air Patrol.
Of course, things are a little different on Earth Two, as the US entered the war a bit earlier, the public has a better awareness of 'being at war' due to attacks on the continental USA, and the Dsp-USN knows in general that the convoy system saves lives (even if some of them grumbled and dragged their feet on it), so the U-boats aren't having a 'Great American Turkey Shoot' in the Atlantic. U-boats are still dangerous, though, and the new satellites can't spot everything (or more accurately, the people examining them take time to find everything, and only have a few satellites watching a rather large area), so the CAP sub chasers are very much still needed.