The FuMO 21 (, "Radio-direction finder, active ranging") was designed in 1941 as a

search radar This is a list of different types of radar. Detection and search radars Search radars scan great volumes of space with pulses of short radio waves. They typically scan the volume two to four times a minute. The waves are usually less than a meter ...

for Nazi Germany's ''

Kriegsmarine The (, ) was the navy of Germany from 1935 to 1945. It superseded the Imperial German Navy of the German Empire (1871–1918) and the inter-war (1919–1935) of the Weimar Republic. The was one of three official branches, along with th ...

'', suitable for ships between

light cruiser A light cruiser is a type of small or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck. Prior to thi ...

and large

torpedo boat A torpedo boat is a relatively small and fast naval ship designed to carry torpedoes into battle. The first designs were steam-powered craft dedicated to ramming enemy ships with explosive spar torpedoes. Later evolutions launched variants of s ...

s in size. First designated FMG 39G(gL),Friedman, p. 205 it received its final designation when the Kriegsmarine revised its radar nomenclature system around 1943.Sieche, p. 5 It was derived from the earlier

Seetakt Seetakt was a shipborne radar developed in the 1930s and used by Nazi Germany's ''Kriegsmarine'' during World War II. Development In Germany during the late 1920s, Hans Hollmann began working in the field of microwaves, which were to later beco ...

search radar and had an antenna in size.

Notes

Citations

Bibliography

* * {{German radars of World War II World War II German radars Naval radars Military equipment introduced from 1940 to 1944