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SMS Magdeburg was the name class of the Magdeburg class of light cruisers. In August 1914, while laying mines in the Baltic, she ran aground, and was destroyed by Russian cruisers. Not of great significance in itself, when the Russians boarded the ship they discovered the main German codebook was still intact.
This was the codebook used for the majority of German naval signals (a second code was used for communications between warships and merchant ships, and a third code was used by flag officers). On 13 October the Russians handed the codebook over to the British, and Naval Intelligence was soon reading German signals. As the German navy was a heavy user of radio, this gave the British a great advantage. The code compromised by the Magdeburg remained in use until May 1917, and for most of this time it was being read by the British.
Displacement (loaded) |
5,587t |
Top Speed |
27.6kts |
Armour – deck |
1.5in-2.25in |
- belt |
2.25in-0.75in |
- conning tower |
4in |
- gunshields |
2in |
- collision bulkhead |
1.5in |
Length |
455ft |
Armaments as built |
Twelve 4.1in guns |
Crew complement |
354 |
Launched |
13 May 1911 |
Completed |
20 August 1912 |
Sunk |
26 August 1914 |