Meteorology · GMDSS Weather — Radiofax
A marine HF radiofacsimile (WEFAX) broadcast is most useful for obtaining:
- AGraphical surface analysis and prognosis charts showing isobars, fronts, and wave fields✓ Correct
- BReal-time AIS targets
- CGPS almanac data
- DTide predictions for a specific port
Explanation
HF radiofax transmits graphic weather products — surface analyses, 24/48/96-hour prognoses, wind/wave and sea-state charts — letting mariners see the synoptic pattern and plan routing far offshore.
Authority: NOAA/NWS Radiofax; WMO; Bowditch (Pub. No. 9)
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