Maritime learning · Web
ROR Trainer
Learn COLREGS. Practise with purpose.
ROR Trainer is a free web study aid for the International Regulations for Preventing Collisions at Sea. It takes the rule text, the lights and shapes a watchkeeper has to recognise, and the sound signals they have to interpret, and turns them into material you can work through and test yourself on.
The training follows one sequence throughout: observe, assess, decide, navigate. You build understanding through written encounters, schematic navigation lights, sound patterns, and explanations linked back to the relevant rule.
- 100+ COLREGS questions
- 41 rules covered
- 6 training categories
- Free · no account needed
What it does
Six training categories, four ways in
COLREGS Rules
Master steering, sailing, responsibilities, and collision avoidance situations, across Rules 1 to 41.
Lights & Shapes
Recognise vessels instantly using navigation lights and day shapes, drawn as schematics rather than photographs.
Sound Signals
Learn manoeuvring signals, restricted visibility signals, and warning indications, and what each pattern is telling you.
Challenge Mode
Apply the rules to written vessel-encounter examples, where you decide who gives way and why.
Made for
Who it is for
Deck cadets, OOW candidates and mariners revising International COLREGS.
The site focuses on International COLREGS. If you need local or US Inland Rules, check the current official text and your examination syllabus separately.
Your information
Your practice, in your browser
There is no account to create, so there is nothing to sign in to and nothing to recover.
Progress stays local
Quiz and scenario progress is stored in this browser when storage is available.
No automatic sync
Progress does not follow you between devices. Practising on a phone and a laptop gives you two separate records.
Free to study
Rule references, recognition exercises and practice questions are all free to use without an account.
Worth knowing
- ROR Trainer is supplementary study material. It is not an official examination, a certification, or a substitute for the official rule text.
Questions
Common questions
Is ROR Trainer free?
Yes. Rule references, recognition exercises and practice questions are free to use without an account.
Who is it for?
Deck cadets, OOW candidates and mariners revising International COLREGS. It is supplementary study material, not an official examination or certification.
Does it cover local or US Inland Rules?
The site focuses on International COLREGS. Check current official local rules and your examination syllabus separately.
Who creates the content?
The site and content are created with Codex. Source references and check dates distinguish the rule text from study explanations.
Can I save my practice?
Quiz and scenario progress is stored in this browser when storage is available.
How do I report a mistake?
Use the correction link on a rule or exercise. Include the item identifier and an official reference if possible, and it will be checked against the source.