HF Systems
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HomeHF SystemsGlobal HFHAP Charts Tuesday, May 21 2013 06:23 UT
Global HF

HAP Charts

HAP charts are designed for communications between a specified base and mobile within a nominated area.

HAP chart features:

  • Each chart shows colours which represent the recommended HF frequencies for contacting the base or mobile within the area bounded by the chart for a particular hour.
  • The geographic zone, which is variable, is represented by a map showing latitude and longitude.
  • Charts are in Universal Time (UT).
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