That's exactly what they did. Don't forget they had Norden bombsights and so could effectively do an early version of CCIP (predicted point of impact).
VLR Liberators finally closed the air-cover gap that the U-Boats enjoyed in the Atlantic in 1944. Horrible flamin things... grrrr....
The U-Flak configuration kicks their arse usually though, but only because (unrealistically) your skilled, specially qualified gunners, have laser sights for eyes...
