COLREG decision quiz
Eighteen scenario-based questions drawn from the International Regulations for Preventing Collisions at Sea 1972 (COLREGs). Each question describes a real encounter — aspect, lights or shapes visible, sea conditions — and asks which Rule applies and what action you must take. Covers: Rule 8 (action to avoid collision), Rule 9 (narrow channels), Rule 10 (TSS), Rule 13 (overtaking), Rule 14 (head-on), Rule 15 (crossing), Rules 16–17 (give-way and stand-on), Rule 18 (responsibilities between vessels), Rule 19 (restricted visibility), and Rule 34–35 (sound signals). Use for STCW officer of the watch preparation or watchkeeping refresher.
When to use this tool
STCW OOW oral-exam preparation (COLREG questions comprise ~40% of most maritime licensing oral exams). Watchkeeping refresher after long shore leave. Bridge-team simulator debrief context. Post-near-miss bridge briefing.
Regulatory basis
COLREGs 1972 (as amended). Rules 1-38. Application to all vessels on the high seas + connected navigable waters. STCW A-II/1 + A-II/2 mandate COLREG proficiency for deck officers. Local + national supplements (US Inland Rules, Canadian Small Vessel Regulations) apply in specific waters.