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Visibility
Calculator
Estimate visibility from weather conditions including precipitation, fog, and spray
Input Parameters
Precipitation
None
Drizzle
Light Rain
Moderate Rain
Heavy Rain
Snow
Fog Condition
Clear
Haze
Mist
Fog
Dense Fog
Wind Speed (knots)
Sea State (Beaufort)
Calculate
Results
--
Estimated Visibility
nm
--
Visibility Class
--
Nav Light Requirement
--
Radar Recommended
Reference
COLREGS Rule 19: Restricted visibility operations Rule 35: Sound signals in restricted visibility Fog: <0.5nm, Mist: 0.5-2nm, Haze: 2-5nm IMO visibility scale: Good >5nm, Moderate 2-5nm, Poor <2nm