用户:Benzheng：修订间差异

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 http://ww2.sinaimg.cn/mw690/83f4061fjw1f22iqlc3prj20ac0u9jvg.jpg
+===顺带一提美国的火控雷达===
+'''Mark 12 with Mark 22 Height Finder'''
+'''Mark 12'''
+War Status:  Used on Mark 37 directors, installed 1944.
+Purpose:  Fire Control of 5" (12.7 cm) guns.
+Power:  100-110 KW
+Wavelength:  33 cm
+PRF:  480
+Transmitter Dimensions:  6 x 6 feet (1.83 x 1.83 m)
+Tracking Range:  45,000 yards (41,000 m) on for bombers and 40,000 yards (37,000 m) for large ships.
+Range Accuracy:  20 yards (18 m)
+Bearing Accuracy:  3 mils
+Resolution:  300 yards (270 m) and 7 degrees
+Notes:  Replaced the Mark 4.  Had automatic tracking in range and measurement of range rate.
+'''Mark 22'''
+Transmitter Dimensions:  1.5 x 6 feet (0.46 x 1.83 m) [known as the "orange peel"]
+Power:  25-35 KW
+Wavelength:  3 cm
+Notes:  Used solely to detect low flying aircraft at 0.8 degrees above the horizon.  Ranges much as for the Mark 12.
+来源：http://www.zhanliejian.com/navweaps/WNUS_Radar_WWII.htm
+http://ww1.sinaimg.cn/mw690/83f4061fjw1f22iqk0isvj20aa065wfd.jpg
+http://ww1.sinaimg.cn/mw690/83f4061fjw1f22iqr2gzkj20aa0d0wfw.jpg
 ==先进型火控雷达==
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 http://ww1.sinaimg.cn/mw690/83f4061fjw1f22iqovow4j20np0fwtdj.jpg
+===顺带一提美国的火控雷达===
+'''Mark 3'''
+War Status:  Used by US Battleships, introduced in late 1941
+Installed:  Mounted on Main Battery Directors
+Purpose:  Fire Control
+Power:  15-20 KW
+Wavelength:  40 cm
+PRF:  1,640
+Transmitter Dimensions:  12 x 3 feet (3.66 x 0.91 m)
+Tracking Range:  40,000 yards (37,000 m)
+Range Accuracy:  40 yards (37 m)
+Bearing Accuracy:  2 mils
+Resolution:  400 yards (370 m) and 10 degrees
+Notes:  First USA set to use lobing.  16" (40.6 cm) shell splashes could be ranged at 20,000 yards (18,500 m).
+http://ww1.sinaimg.cn/mw690/83f4061fjw1f22iqj77jrj20ac0b640d.jpg
+http://ww1.sinaimg.cn/mw690/83f4061fjw1f22iqk0isvj20aa065wfd.jpg
+'''Mark 13'''
+War Status:  Used by US Battleships and Cruisers
+Installed:  Mounted on Main Battery Directors
+Purpose:  Fire Control
+Power:  50 KW
+Wavelength:  3 cm
+PRF:  1,800
+Transmitter Dimensions:  8 x 2 feet (2.44 x 0.61 m)
+Tracking Range:  40,000 yards (37,000 m) on Battleship sized target
+Range Accuracy:  15 yards (5 m)
+Bearing Accuracy:  2 mils
+Resolution:  400 yards (370 m) and 10 degrees
+Notes:  This radar could discern individual shell splashes from 16-inch (40.6 cm) projectiles out to over 42,000 yards (38,400 m).
+来源：http://www.zhanliejian.com/navweaps/WNUS_Radar_WWII.htm
+http://ww4.sinaimg.cn/mw690/83f4061fjw1f22iqruq8oj20a401ja9z.jpg
+http://ww4.sinaimg.cn/mw690/83f4061fjw1f22iqsu9h0j20a40t00x9.jpg
 ==英国274型雷达==