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Re: HMS Turbulent
Posted by: Bruce Dennis ()
Date: October 04, 2008 09:32PM

Platon,
You are correct to say the source was SIGINT, as that was the name for the collection of information from all the radio and signals sources, whether quoting directly from intercepted text (as in Enigma decrypts, referred to as ULTRA) or interpreting information and making a deduction (as in direction finding and Traffic Analysis). The Italian section at Bletchley Park was very successful in its efforts against the Italian Naval machine encoded traffic. This was in part because the Italian navy used an Enigma - type machine, but without some of the refinements introduced to the KM Enigmas. (The Italian machine did not have the 'plug-board' wiring options introduced prewar in German equipment). However, much of the BP success against Italian convoys came from two other sources: (a) lower grade Italian traffic, which was often broken, and (b) Luftwaffe Enigma traffic which was regularly read within hours for the bulk of the war. There were other ciphers that helped, such as the Police traffic, but Luftwaffe liaison officers messages being repeated in other ciphers, both Enigma and hand-cipher, were the day to day key to the contents of Italian messages. The Luftwaffe traffic was also the ‘way in’ to several other German systems, including some of those in use by the Kreigsmarine.

The German B-deinst warned the OKW of Italian vulnerability due to the less sophisticated encoding machines in use by her navy, but nothing came of it. Also, there was also at least one example (never verified but circumstantial evidence) of a KM liaison officer on an Italian submarine having his own Enigma to communicate with his superiors: it backfired, as the cipher he was using was already broken by BP and hence used to help keep abreast of the contents of Italian messages.

In light of the varied sources available on a regular basis, it may be that the messages in ADM 223/31 are from source ULTRA, but without something specific to say so, it is not safe to assume so.

Hope this helps,

Bruce

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Subject Written By Posted
HMS Turbulent Michael Akehurst 05/23/2003 10:45PM
Re: HMS Turbulent Brian 05/24/2003 12:15AM
Re: HMS Turbulent Michael Akehurst 05/24/2003 05:05PM
Re: HMS Turbulent Peter Skinner 01/30/2005 04:56PM
Re: HMS Turbulent Christopher Morgan-Jones 04/03/2008 03:35PM
Re: HMS Turbulent Platon Alexiades 04/09/2008 07:56PM
Re: HMS Turbulent tubby linton 04/10/2008 11:50PM
Re: HMS Turbulent Platon Alexiades 04/11/2008 04:39AM
Re: HMS Turbulent tubby linton 04/11/2008 10:46AM
Re: HMS Turbulent Platon Alexiades 04/13/2008 11:58PM
Re: HMS Turbulent tubby linton 04/16/2008 10:54PM
Re: HMS Turbulent Francesco Mattesini 06/29/2008 03:24PM
Re: HMS Turbulent Platon Alexiades 07/01/2008 04:19PM
Re: HMS Turbulent Mattesini Francesco 07/01/2008 05:28PM
Re: HMS Turbulent tubby linton 09/30/2008 10:11PM
Re: HMS Turbulent Platon Alexiades 10/04/2008 12:04AM
Re: HMS Turbulent Bruce Dennis 10/04/2008 06:21PM
Re: HMS Turbulent Platon Alexiades 10/05/2008 03:04AM
Re: HMS Turbulent Bruce Dennis 10/05/2008 06:37PM
Re: HMS Turbulent Platon Alexiades 10/07/2008 01:54AM
Re: HMS Turbulent Bruce Dennis 10/07/2008 10:30AM
Re: HMS Turbulent tubby linton 10/06/2008 12:59PM
Re: HMS Turbulent Platon Alexiades 10/07/2008 02:22AM
Re: HMS Turbulent tubby linton 03/09/2012 07:54PM
Re: HMS Turbulent Platon Alexiades 10/04/2008 07:58PM
Re: HMS Turbulent Bruce Dennis 10/04/2008 09:32PM
Re: HMS Turbulent Platon Alexiades 10/07/2008 12:11PM
Re: HMS Turbulent tubby linton 11/05/2008 12:55PM
Re: HMS Turbulent Platon Alexiades 11/05/2008 01:38PM
Re: HMS Turbulent Bert Laacks 11/05/2008 08:18PM


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