COLREG / ARPA / AIS Bridge Rule 6 Rule 19(b) 🔒 Course / Premium

Safe Speed in Fog (Rule 6)

Visibility is under 1 NM and AIS shows dense traffic. Rule 6 requires every vessel to proceed at a SAFE SPEED appropriate to prevailing conditions.

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Scenario briefing

Visibility is under 1 NM and AIS shows dense traffic. Rule 6 requires every vessel to proceed at a SAFE SPEED appropriate to prevailing conditions. Rule 19(b) reinforces this for restricted visibility. Reduce SOG to 6 kt, then click EVALUATE.

Applicable COLREG rule(s)

Rule 6 — referenced in this scenario. Practising this scenario reinforces correct application under realistic time pressure.

Rule 19(b) — referenced in this scenario. Practising this scenario reinforces correct application under realistic time pressure.

Why it matters

COLREG knowledge is the foundation of safe ship handling. Most maritime collisions happen because watchkeepers either misidentified the situation, applied the wrong rule, or acted too late. This scenario lets you train pattern recognition + correct response under time pressure — the exact skill the rules are designed to support. RYA, Yachtmaster, STCW and most national exams expect you to apply COLREGs reflexively, not just recite them.

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