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USAF High Frequency Global Communications System Revision date: 28 February 2016 © Ary Boender / Utility DXers Forum - UDXF www.udxf.nl The High Frequency Global Communications System (HF-GCS) is a network of single si
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Document Date: 2017-11-06 04:33:41
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USAF High Frequency Global Communications System Revision date: 28 February 2016 © Ary Boender / Utility DXers Forum - UDXF www.udxf.nl The High Frequency Global Communications System (HF-GCS) is a network of single si