Difference between revisions of "GR - Ranging"

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* [[GR-1]], ground listening set ( formerly geophone) 71-246
+
* [[GR-1]], ground listening set ( formerly geophone) 71-246. 1924
 
* [[GR-2]]
 
* [[GR-2]]
 
* [[GR-3]] sound ranging
 
* [[GR-3]] sound ranging

Latest revision as of 21:42, 26 December 2020

  • GR-1, ground listening set ( formerly geophone) 71-246. 1924
  • GR-2
  • GR-3 sound ranging
  • GR-4 Flash ranging
  • GR-5 hydroacoustic tracking set
  • GR-6 sound ranging
  • GR-7 hydroacoustic tracking set
  • GR-8 sound ranging
  • GR-9
  • GR-10