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Line 3: \|image = Large Seetakt Coastwatcher radar illustration.png \|caption = \|country = [[Germany]] \|introdate = 1936 \|number = Line 21: \|other names= }} '''Seetakt''' was a shipborne [[radar]] developed in the 1930s and used by the German Navy (''[[Kriegsmarine]]'') during [[World War II]]. It is the first naval radar to enter service, and among the earliest radars of any sort. It provided range measurements with an accuracy on the order of {{convert\|50\|m\|ft}}, more than enough for gunnery. Its angle accuracy was not very good, but the development of [[lobe switching]] specifically for this radar provided about 1 degree accuracy, not enough to directly lay the guns, but still useful for initial plotting and aiding the optical spotters find their target. ~~'''Seetakt''' was a shipborne radar developed in the 1930s and used by Nazi Germany's ''[[Kriegsmarine]]'' during [[World War II]].~~ == Development == Line 31: \|url=http://www.vectorsite.net/ttwiz7.html#m4 \|title=Early German radars: SEETAKT, FREYA, WUERZBURG \|~~dead-~~url-status=~~yes~~dead \|archiveurl=https://web.archive.org/web/20060811050443/http://www.vectorsite.net/ttwiz7.html#m4 \|archivedate=2006-08-11 Line 40: These early systems proved problematic, and a new version using improved electronics at 60 cm wavelength (500 MHz) was introduced. Four units were ordered and installed on the ''Königsberg'', [[German pocket battleship Admiral Graf Spee\|''Admiral Graf Spee'']] and two large [[torpedo boat]]s (which in German service were the size of small destroyers). The ''Admiral Graf Spee'' used this unit successfully against shipping in the Atlantic. In Dec. 1939, after heavy fighting during the [[Battle of the River Plate]], the ''Admiral Graf Spee'' was severely damaged and the captain scuttled the ship in the neutral harbor off [[Montevideo, Uruguay]]. The ship sank in shallow water such that its radar antenna was still visible. These early-model Seetakt systems were followed in 1939 by a modified version known as ''Dete 1'', operating between 71 and 81.5 cm [[wavelength]] (368 to 390 MHz) at 8 kW peak and a [[pulse repetition frequency]] of 500 Hz. Maximum range against a ship-sized target at sea was up to {{convert\|~~220~~22.0\|km\|mi\|sp=us}} on a good day, though more typically half that. Performance was otherwise similar to the earlier system, with a range accuracy of about 50 m. This was considerably more accurate than the guns they ranged for, which typically had spreads of over 100 m. It was also much better than the typical optical rangefinding equipment of the era, which would typically be accurate to about 200 m at 20,000 m, albeit some German optical rangefinders were reportedly capable of 40-50 m accuracy at that range, which helps to explain why the Germans continued to rely on optics as their primary maritime range finding equipment for several years into the war. ~~==See also==~~ * [[List of World War II electronic warfare equipment]] * [[FuG 224 Berlin A]], an airborne radar adapted for naval use * [[Hohentwiel (Radar)\|Hohentwiel Radar]] - Replaced the ''Seetakt'' radar during [[World War II]]. ==References== Line 62 ⟶ 57: [[Category:World War II German radars]] [[Category:Naval radars]] [[Category:German inventions of the Nazi period]] [[Category:Military equipment introduced in the 1930s]]