As a follow up: A photo of the 2.5 characters/sec military "Field" Hellschreiber is here: The 5 char/sec "Presse Hell" Hellschreiber is a shoebox size printer-only model, used by news agencies worldwide 1934-1950. It was definitely used on-board Kriegsarine ships. A photo of this model is here:
Forum: Technology and Operations

Hello All, For several years now, I have been searching literature and the web to find out what type of teleprinters were used in U-Boats. In particluar the so-called Hellschreiber. You can find out all about this teleprinter system (invented by Dr Rudolf Hell in 1929), on my website www.hellschreiber.com I know for sure that Hellschreibers were used in U-Boats, as the Kriegsmarine had a 1
Forum: Technology and Operations