COLREG / ARPA / AIS Bridge Rule 10(c) ✓ Free demo

TSS — Crossing at Right Angles (Rule 10(c))

You must cross a Traffic Separation Scheme whose lanes run NS (shown on the PPI).

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Try this scenario in the live simulator now Hands-on practice — runs in your browser, no install needed.

Scenario briefing

You must cross a Traffic Separation Scheme whose lanes run NS (shown on the PPI). Rule 10(c): a vessel crossing traffic lanes shall do so on a heading as NEARLY AT RIGHT ANGLES to the general direction of traffic flow as practicable. Rule 10(j): do NOT impede the safe passage of vessels following the lane. Cross with heading 080°100° (east-bound) AND keep CPA 0.5 NM on any lane-traffic vessel if a risk of collision develops, the scenario fails. Click EVALUATE when you have crossed both lanes.

Applicable COLREG rule(s)

Rule 10(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.