COLREG / ARPA / AIS Bridge
Rule 2(a)
Rule 2(b)
Rule 17(c)
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Rule 2 — Departure to Avoid Immediate Danger
DILEMMA: Clear visibility. You are the STAND-ON vessel in a crossing situation a power-driven give-way vessel is on your PORT side and has failed to act.
This scenario is part of the full library.
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Scenario briefing
DILEMMA: Clear visibility. You are the STAND-ON vessel in a crossing situation a power-driven give-way vessel is on your PORT side and has failed to act. Rule 17(c) forbids altering course to PORT for a vessel on your own port side. However, shoal water lies immediately to STARBOARD a starboard turn would put you aground. Which response best complies with COLREG 72?
Applicable COLREG rule(s)
Rule 2(a) — referenced in this scenario. Practising this scenario reinforces correct application under realistic time pressure.
Rule 2(b) — referenced in this scenario. Practising this scenario reinforces correct application under realistic time pressure.
Rule 17(c) — 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.