Test yourself
The COLREGs quiz
10 multiple-choice questions drawn at random from 34, on the steering rules, lights and sound signals. Pick an answer, or press 1 to 4; the arrows move between questions. Your scores stay in this browser.
Ready when you are
10 questions drawn at random from 34: who gives way, what those lights are, and what that whistle means. The clock starts when you do.
A training aid, not the official text. The COLREGs are an IMO convention, and your national authority publishes the version that applies in its waters. Check the rules themselves before you rely on them at sea. Download the rules.