Lexandro, actually that's not quite right, the first German hydrophone, the GHG, has no "head", it's a handful of sensors on the lower hull just behind the torpedo tubes and below the waterline. Still that doesn't mean it was of any use on the surface, same for the later Balkon Gerat, despite it being placed a bit lower :
http://www.xs4all.nl/~aobauer/GHG1996.pdf
I was wrong about the on-deck KDB in game, indeed this one can't hear things while surfaced. But both the GHG and Balkon Gerat can pick contacts at ~25km while running at 20knots on the surface in foul weather, and no technical speak can justify that, it's just wrong regardless of what the game models or not.
@Steve, for what it's worth when I play all the fancy cameras are disabled, but I enable them when testing or working on mods and these little things bug me, especially knowing that it's a very quick fix. And hey, you can see the UZO through your periscope when submerged, it's just not right and there's no way you could blame Bernard for that one
