Reduced Visibility

Definition

Any condition limiting sight below defined thresholds — fog, rain, snow, sandstorm — triggering COLREGS Rule 19 (safe speed, fog signals, radar use)

Exam Relevance

This term is tested in DG Shipping MEO Class 4 orals, 2nd Mate FG assessments, and STCW competency evaluations. Ensure you can define, apply, and give an operational example.

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