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'''SJ radar''' was the name of a type of [[radar]] set used on [[United States]] [[warships]] during the [[Second World War]]. The widespread use of the SJ radar, combined with the very low use of radar in the [[Imperial Japanese Navy]] gave great operational flexibility to the [[U.S. Navy]]'s submarine campaign in the [[Pacific Ocean]].<ref>[http://www.valoratsea.com/subwar.htm Battle Beneath the Waves: WWII U.S. Submarines at War in the Pacific]</ref> |
'''SJ radar''' was the name of a type of [[radar]] set used on [[United States]] [[warships]] during the [[Second World War]]. The widespread use of the SJ radar, combined with the very low use of radar in the [[Imperial Japanese Navy]] gave great operational flexibility to the [[U.S. Navy]]'s submarine campaign in the [[Pacific Ocean]].<ref>[http://www.valoratsea.com/subwar.htm Battle Beneath the Waves: WWII U.S. Submarines at War in the Pacific]</ref> |
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The first prototype SJ was deployed in December 1941,<ref>[http://www.vectorsite.net/ttwiz4.html Microwave Radar at War]</ref> but it was mid-1942 before they became common equipment. The SJ was the second type of radar deployed on submarines during the war, representing a substantial improvement over the previous [[SD radar]]. The SJ provided directional information, provided highly accurate distance information, and provided information about surface contacts as well as low-flying [[aircraft]].<ref>[http://www.hnsa.org/doc/radar/part4.htm United State Navy Radar Operator's Manual - April 1945]</ref> |
The first prototype SJ was deployed in December 1941,<ref>[http://www.vectorsite.net/ttwiz4.html Microwave Radar at War]</ref> but it was mid-1942 before they became common equipment. The SJ was the second type of radar deployed on submarines during the war, representing a substantial improvement over the previous [[SD radar]]. The SJ was a variant of the SG surface search radar used on surface warships, contained in sets capable of fitting through submarine hatches for installation and designed to lie close to the curved hulls. |
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The SJ provided directional information, provided highly accurate distance information, and provided information about surface contacts as well as low-flying [[aircraft]].<ref>[http://www.hnsa.org/doc/radar/part4.htm United State Navy Radar Operator's Manual - April 1945]</ref> |
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The SJ radar was even used as a communications device. When used with a telegraph key, the SJ radar could send signals on a point-to-point basis between two submarines operating in a [[wolf pack]].<ref>[http://www.vectorsite.net/ttwiz4.html Microwave Radar at War]</ref> The directionality of the antenna and the short range provided relatively high security for this transmission. |
The SJ radar was even used as a communications device. When used with a telegraph key, the SJ radar could send signals on a point-to-point basis between two submarines operating in a [[wolf pack]].<ref>[http://www.vectorsite.net/ttwiz4.html Microwave Radar at War]</ref> The directionality of the antenna and the short range provided relatively high security for this transmission. |
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Revision as of 02:20, 5 June 2008
SJ radar was the name of a type of radar set used on United States warships during the Second World War. The widespread use of the SJ radar, combined with the very low use of radar in the Imperial Japanese Navy gave great operational flexibility to the U.S. Navy's submarine campaign in the Pacific Ocean.[1]
The first prototype SJ was deployed in December 1941,[2] but it was mid-1942 before they became common equipment. The SJ was the second type of radar deployed on submarines during the war, representing a substantial improvement over the previous SD radar. The SJ was a variant of the SG surface search radar used on surface warships, contained in sets capable of fitting through submarine hatches for installation and designed to lie close to the curved hulls.
The SJ provided directional information, provided highly accurate distance information, and provided information about surface contacts as well as low-flying aircraft.[3]
The SJ radar was even used as a communications device. When used with a telegraph key, the SJ radar could send signals on a point-to-point basis between two submarines operating in a wolf pack.[4] The directionality of the antenna and the short range provided relatively high security for this transmission.
References
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