COLREG / ARPA / AIS Bridge Rule 9(e) Rule 13 🔒 Course / Premium

Narrow Channel Overtaking (Rule 9(e))

You are in a narrow channel overtaking a slower vessel. Rule 9(e)(i): overtaking is only permissible when the overtaken vessel has to take action to all...

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This scenario is part of the full library. Unlock all 54 COLREG scenarios with the Skipper Refresher Course (€99.99, lifetime + certificate) or a Premium subscription (from €29.99/mo).

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Scenario briefing

You are in a narrow channel overtaking a slower vessel. Rule 9(e)(i): overtaking is only permissible when the overtaken vessel has to take action to allow safe passing. In this sim, pass with CPA 0.3 NM while staying between the two dashed yellow channel edges (the channel is 1.4 NM wide do not cross either dashed line).

Applicable COLREG rule(s)

Rule 9(e) — referenced in this scenario. Practising this scenario reinforces correct application under realistic time pressure.

Rule 13 — referenced in this scenario. Practising this scenario reinforces correct application under realistic time pressure.

📸 Bridge simulator scene

Captured directly from the SkipperCheck COLREG bridge simulator at scenario T = 0 — the moment the encounter begins.

SkipperCheck bridge simulator — COLREG Rule 9(e) — Narrow channel — overtaking — radar PPI with AIS targets — Bridge-simulator scene under COLREG Rule 9(e) — Narrow channel — overtaking. Captured from the SkipperCheck COLREG / ARPA / AIS bridge simulator.

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

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ARPA · AIS · COLREG Bridge Simulator — 54 scenarios covering Rules 2, 5–10, 12–19, 23–30, 34 and 35.
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