HAP Charts
IPS intends to move the USA HAP charts to the World HAP charts and cease producing the USA regional map.
The IPS world map is available for near vertical incidence ionospheric support.
This change is planned for early in October. If this is a concern to you please email office@ips.gov.au
HAP charts are designed for communications between a specified base and mobile within a nominated area.
- 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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HF Systems