When in 44 ?
Depending on the boat you have the GWX - Late War Sensors Snorkel Antennas can be enabled
Oct 44 IIRC but cant remember which sub that is for - the manual will say
Will add radar warning on top of the snort
ah here
1. FuMB-3
Bali: All type VII and Type IX U-boats and their variants mount this antenna on their
schnorchel
starting in October 1944 as part of the FuMB-29 Bali-Anlage.
2. FuMB-37 Leros: All Type XXI U-boats mount this antenna atop their schnorchel starting in
January 1945.
Page 65 onwards