Meteorology · Beaufort Scale
The Beaufort scale relates wind force to:
- ABarometric pressure
- BCloud height
- CAir temperature
- DThe observed appearance of the sea (and effects), with corresponding wind speeds✓ Correct
Explanation
The Beaufort scale (Force 0–12) lets a mariner estimate wind speed from the state of the sea (wave appearance, foam, spray) and effects on the vessel, useful when no anemometer reading is available.
Authority: WMO/Bowditch (Pub. No. 9), Beaufort wind scale
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