What is Dense Fog Advisory?
Dense Fog Advisory Warning issued when visibility expected below one-half nautical mile due to thick fog, requiring sound signals and speed reduction.
Source: IMO SMCP, STCW Convention, SOLAS, COLREG
How is “Dense Fog Advisory” Used in Practice?
USCG Sector San Francisco issues dense fog advisory for Golden Gate approaches; all vessels must maintain safe speed and sound signals per Rule 35.
Certification Exam Relevance
Who Needs to Know This Term?
- Deck Officers
- Engine Officers
- Masters
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What is Dense Fog Advisory?
Warning issued when visibility expected below one-half nautical mile due to thick fog, requiring sound signals and speed reduction.
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