COLREG / ARPA / AIS Bridge
Rule 19(d)(ii)
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RV — Target Abeam Starboard (Rule 19(d)(ii))
A target is detected abeam on your starboard side (relative bearing ~090).
This scenario is part of the full library.
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Scenario briefing
A target is detected abeam on your starboard side (relative bearing ~090°). Rule 19(d)(ii): AVOID alteration of course TOWARD a vessel abeam or abaft the beam. A starboard alteration is therefore prohibited here. Consider a port alteration or speed change.
Applicable COLREG rule(s)
Rule 19(d)(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.
Both run in any modern browser, on desktop or mobile. No install, no plugins.