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Comments to #40
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Valentina 9 hours ago
#40 Early SONAR maybe but not RADAR.
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Derrick 6 hours ago
#21 man I don't know what kind of cars have you had since but practically all cars have that option for the past twenty years.
A German Officer And An Nco Wearing Portable Sound Locating Apparatus’s To Detect Enemy Aircraft (This Was A Type Of Early Radar). Western Front, 1917
