单词 | horizontal obstacle sonar |
释义 | horizontal obstacle sonar [´här·ǝ`zänt·ǝl ¦äb·stǝ·kǝl `sō´när] NAVIGATION A constant-transmission, frequency- modulated sonar used in underwater navigation to detect objects ahead of a submersible vehicle and to determine the bearing and range of specially designed transponders. Abbreviated HOS. |
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