Perhaps the German name might give you a clue

Jimbert

 

My name ain't Louis Armstrong........there was also a Rote Kapelle.

On the subject, what was a "Bandstand" on a U-Boat?

 

You've obviously never encountered my map reading skills.

Bandstand was the anti-aircraft platform usualy positioned at the back of the conning tower.  20mm, 20mm quad, 30mm twin.

Late in the war the AA armament increased due to the allied affectiveness of centimetric radar and U boats sometimes fought it out on the surface, occassionaly bringing down the attacking aircraft.

The alternative was to crash dive, with the U boat becoming a sitting duck for a minute or so until it could get underwater and also change course

Around 120 aircraft were shot down by U-boats for the loss of roughly 30 U-boats either sunk during the attack or due to being located by other forces shortly afterwards and sunk. (See link above for actual figures)

One source says that RAF Coastal Command (U-boat hunters) lost 700 aircraft (badly damaged, shot down and paid off) and sank 220 U-boats during the war. I've been unable to verify the RAF losses but the U-boat figure is about right it seems. These figures show the immense effort put out by the British to hunt down the U-boats and almost all the aircraft successes took place in 1942 and later. In 1939-1941 only some 2 U-boats were sunk by aircraft (31 in 1942 alone).

Funk

This is one helluva package. 2 x twin 37mm Bofrs plus 1 20mm Flakvierling.

 

I don't know about the 37mms, but the 20 mm could not be waterproofed. By this time, 1942, the 105mm deck guns were being removed, a rolling U-boat was a bad gun platform and the gun was worth 2-3 knots in drag.

 

If you click on to this link in #7 above, it shows the enormous aircraft losses by type , shot down by U-Boats.

700 sounds a bit high.

 

If it was 700, it was still well worth the cost as an aircraft had a crew of 7 or 8 (mosquito 2) and a U-boat ?   I would guess about 50-60    and how long did it take to make a U-boat?  and the cost?

Yes, U IX class 50 men (3 officers). They tried to make the XX1 class in modules to permit dispersal, but only 3 ever sailed.

I would assume the 578 battle damaged aircraft would have had a large proportion of survivors.

130,000 out of 170,000 U-Boat crewmen killed. The highest proportion of any service (including our bomber command)