May I point out , in respect of the original problem (too many aircraft attacks after June 1943), that the difficulty can largely be avoided by installing my new radar detection mod which stamps itself over any previously modded sensors.dat file:

You can download "radar_detection.exe" as "radar_detection.zip" from:
http://u-boot.realsimulation.com/

Excellent - found and applied! :yep:

Thanks Stiebler - applied. Now I just have to get back to '43 (Oct. 1939 now, U-48's 4rth patrol with green crew)

kb