As a newbie with GWX I stumbled on the issue of using the optional "Late War sensor" mod delivered together with the GWX-package.
It works for both type VIIC, VIIC/41 and all versions of IXC & D.
What it does is installing an extra RW antenna on top of Schnorchel Head like this scetch;

(Uboot.net)
A few boats are thought to have been equipped with it according to various sources.
To the point;
I just found out (by sailing

) that the XXI boat does not get this mod implemented.
Q: Is this deliberate or just "forgotten" during development?:hmm:
Cheers
/Per
Happy GWX user
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SHIV:TMo 2.5, RSRD, SCAF OLC, Ralle's modpack
SHIV: WDAD, Med Campaign
SHIII: GWX3 GOLD, OLCII Gold, ACM-reloaded interface mod, SHIIIcmndr 3.2, Full Realism/DiD
SHIII: LSH3 2015
Cold Waters with all bells and whistles
Finally SHV but still unmodded and still a noob....