We have had a long, and at times terse, argument on the Danish site about the immense influence of the GHG on PG's actions at the Denmark Straits, (and Lutjen's) and whether Bismarck had a GHG at all, and their webmaster produced this drawing, but oddly refused to be drawn on what evidence it was based. It appears strangely, unnecessarily compact, when a bigger baseline would surely have made it more effective.
I have been searching for years for a photo or original drawing of this highly secret system on a surface ship but have found nothing. Amazing performance is claimed for this system (equalling modern systems), and yet at other times it seems to have been completely ineffectual. Ulrich has turned up interesting comments in the Tirpitz War Diary about GHG and the ideal listening speed.
To Tommy. Yes I guess censors might have airbrushed it out, but this was a public occasion in peacetime with foreign reporters around so it couldn't be hidden that easily. Usually censors just scraped off the emulsion or scratched the negative (no Paintshop then).
Dry docking after launch. Bismarck was drydocked in late June early July 1940 and maybe it was fitted then but viewing http://www.kbismarck.com/construci.html
the alongside shot shows a strange block shaped structure attached to the hull in about the right location. Could this be a cofferdam stretching down below the waterline and allowing the installers to cut 60 holes (each side) in the hull to install GHG transducers? Does anybody know of any dry dock pictures which might show the system?
Dave, Glad to see you on the case. I have found the Bauer article but do you have more specifically on GHG? U-boats all had GHG and yet were apparently forced to use the MK1 eyeball to find convoys instead of this wonder system hearing many thrashing screws from many miles away.
describes with teutonic pride the trials where PG dodged 34 practice torpedoes off Balboa but totally fails to mention the follow up when the system was removed to be installed in USS Flying Fish. This is odd considering the author mentions the dismissive attitude of US technicians to PG's radar systems.
Hope others find this system as interesting as I do.
All the Best