COLREG / ARPA / AIS Bridge
Rule 18(a)(iv)
Rule 16
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Power-Driven Gives Way to Sailing Vessel (Rule 18(a)(iv))
AIS identifies the target as a sailing vessel (badge "S"). You are a power-driven vessel Rule 18(a)(iv): a power-driven vessel under way shall keep out...
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Scenario briefing
AIS identifies the target as a sailing vessel (badge "S"). You are a power-driven vessel Rule 18(a)(iv): a power-driven vessel under way shall keep out of the way of a sailing vessel. Take early and substantial action, CPA 1 NM in open water.
Applicable COLREG rule(s)
Rule 18(a)(iv) — referenced in this scenario. Practising this scenario reinforces correct application under realistic time pressure.
Rule 16 — 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.
Both run in any modern browser, on desktop or mobile. No install, no plugins.