German Naval Radar

Updated 17 October 1999
7. Light Cruisers and other Major Units

Light Cruisers

None of the German light cruisers which took part in the assault on Norway had radar.  Two of the three 'K' class cruisers were lost in this operation, so the only remaining modern light cruisers were Köln and NürnbergLeipzig's fighting potential having been so reduced by a torpedo hit, that she served as a cadet training ship for the rest of the war as did the obsolete Emden.

While Köln and Nürnberg served with the Norwegian stand-by-force, they were fitted with a FuMO 21, with 2m x 4m mattress antennas in place of the forward rangefinder.

In the summer of 1944 Nürnberg received a large FuMO 25 frame on one of the yardarms of the armored tower, above that, on a smaller yardarm was a rotating frame carrying two Palau dipoles.  However, one photograph of Nürnberg indicates that earlier she had a FuMO 22 with a 2m x 4m mattress antenna, place on her prominent forward yardarm.

The flanks of the armored spotting top were surrounded by some five fixed Sumatra dipoles which remained in place when the Palau frame was installed later, only one Sumatra, bearing in the forward direction, being removed. 
Leipzig was similarly equipped after her recommissioning in August 1943, only the form of the large outrigger and the position of the yardarm supporting the Palau frame being different. 

As Köln was active until the end of the war, it may be assumed that she was modified to the same standards, but there are no photographs showing this. 
As the only remaining active major German surface vessel in the latter stages of the war, Nürnberg was fitted with a fully trainable FuMO 63 Hohentwiel-K on the top of her mainmast, which had to be strengthened with tripod legs.  In the last phase of the war Emden received a FuMO 25 in similar configuration.


Picture 8.1
Light Cruisers

Köln's forward rangefinder replaced by FuMO 21 antenna (as fitted in destroyers) in the summer of 1941 or 1942; carried until 30 April 1945.  Modification, similar to those in the FuMO 25 of Leipzig, is possible but uncertain.

Picture 8.2
Light Cruisers
Nürnberg with forward rangefinder replaced by FuMO 21 antenna, summer 1941 - summer 1944

Picture 8.3
Light Cruisers
Nürnberg with a  FuMO 24/25 antenna on a Prinz Eugen-type bracket, a FuMB 6 Palau antenna above and fixed Sumatra antennas on the spotting top, summer 1944 - May 1945



Picture 8.4
Light Cruisers
Leipzig after re-commissioning, 1 August 1943, with the large FuMO 24/25 antenna forward of her bridge tower and a FuMB 6 Palau above it.


Picture 8.5
Light Cruisers

Nürnberg's mainmast with a FuMO 63 Hohentwiel-K at its head and tripod struts added for stiffness, Summer 1944 - May 1945.


 Other major units

During extensive refits in the last weeks of the war, the two old pre-dreadnought battleships Schleswig and Schleswig-Holstein were equipped with radar similar to that in Nürnberg and Leipzig:  A FuMO 25 with a large 2m x 6m mattress on an outrigger and a smaller training Palau frame above.

Most larger auxiliaries, such as tenders of the Wilhelm Bauer class, the Gustav Nachtigal class and the Carl Peters received a standard FuMO 21.

The floating AA batteries Udine, Ariadne, Niobe and Arcona, some built on the hulks of First World War cruisers (e.g. the Gazelle class), were fitted with the AA fire control radars FuMO 212 or 213 Würzburg-C or -D.

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