German Naval RadarUpdated 17 October 1999
The radar equipment of German destroyers followed a standard pattern, and only at the end of the war do we find some individual layouts. The first standard equipment was the FuMO 21 (Zerstörerdrehsäule) with a 2m x 4m mattress installed above a special radar-office between foremast and bridge. In earlier types, with their short bridges, the frame could not be trained over its full arc but all German destroyers were in any case limited to this bearing angle by the mast. From the summer of 1943 the improved FuMO 25, with 2m x 6m mattress, was introduced, and was first fitted in the older boats.
To fully train the frame a distinctive
'goal post' (Tormast) mast was developed, the later type having sufficient
space around their radar office for this structure. From the summer of
1944 some boats were fitted with a FuMO 63 Hohentwiel-K in place
of the after searchlight platform, and a FuMB 6 Palau on a yardarm
of the foremast. The passive equipment consisted of four fixed Sumatra
dipoles situated either around the forward searchlight sponson, or at the
level of the tripod junction.
A most interesting system was developed
for the type 1944 destroyer Z52. It consisted of an AA director,
similar to US Navy types, fitted with the 1.5m parabolic dish antenna of
a FuMO 231 Euklid. In next stage of development, it was planned
to switch down the set to 3cm wavelength to become the Euklid-Z.
Originally the smaller types of German
torpedo-boats had no radar equipment. As the FuMO 21 Zerstörerdrehsäule
was too heavy for them, some of the 1935 type boats and the 1937 type boats
received a FuMO 28 with fixed mattress; two fixed 2.3m x 3.8m antenna being
installed on the tripod foremast (Picture 9.8).
The larger boats of 1939 type received
a FuMO 21, but limited arc of training. Two forms of outrigger were employed
to support the 2m x 4m mattress antennas of this set. Although his class
of ships numbered no less than 15 boats, which served throughout the war,
there are surprisingly few photographs of them. One shows that at least
one boat had her after searchlights replaced by a FuMO 63 Hohentwiel-K
as in some destroyers