COLREG / ARPA / AIS Bridge
Rule 18(a)(ii)
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Power-Driven Gives Way to Vessel RAM (Rule 18(a)(ii))
The AIS target reports "Restricted Ability to Manoeuvre" (RAM) e.g. a cable-layer or dredger (badge "R").
This scenario is part of the full library.
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Scenario briefing
The AIS target reports "Restricted Ability to Manoeuvre" (RAM) e.g. a cable-layer or dredger (badge "R"). Rule 18(a)(ii): a power-driven vessel shall keep out of the way of a vessel restricted in her ability to manoeuvre. Give way early.
Applicable COLREG rule(s)
Rule 18(a)(ii) — 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.
Related scenarios
About SkipperCheck simulators
SkipperCheck offers two browser-based maritime training simulators:
- ARPA · AIS · COLREG Bridge Simulator — 54 scenarios covering Rules 2, 5–10, 12–19, 23–30, 34 and 35.
- VHF SRC Radio Simulator — 15 scenarios: voice Mayday, DSC distress, Mayday Relay, Pan-Pan, Sécurité, routine.
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