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RulesAtSea

Free quizzes · original teaching questions

Practise COLREGs, lights, shapes, sounds and buoyage.

Choose a short boating rules quiz, inspect a visual or sound cue, and check the explanation. Retry missed questions, then take the same concept into a moving simulator situation.

Choose a quizExplore the learning guides

No account needed · accessible sound and light sequences · explained answers

Choose the skill to revise

Five ways to check your understanding

How the practice quizzes work

  1. Read the context and cue. Describe visible lights, shapes or marks, or listen to a complete signal.
  2. Choose and check an answer. Review its explanation and rule reference, then continue to your results.
  3. Retry and apply it. Revisit missed questions and open the linked simulator scenes to observe movement and replay.

Free, original supplementary practice using International COLREGs / IRPCS and separately labeled IALA Regions A and B. These are authored learning questions, not official examination questions or a qualification. Use the full applicable rules, current charts and local requirements on the water.

The quiz works in an ordinary JavaScript browser without WebGL. With JavaScript off, each topic still provides its concepts, explained answers, source references and practice links.

Connect recognition to action

Take the watch in the simulator

A quiz checks a selected observation or authored decision. The marine simulator lets you inspect the scene from aboard and on the chart, choose an action, and watch the encounter develop.

Open the simulator