HelmChart - COLREGs
Right of way, decoded.
$2.99 · Designed for iPad. Not verified for macOS.
Also Included In
All 38 COLREGs rules with full official wording, lights and shapes, scenario drills and a 40-question final test. Buy once: no subscription, no account.
Read the water. Right of way, decoded.
HelmChart turns the International Regulations for Preventing Collisions at Sea into something you can actually drill. Every rule is a card you can study in a minute, every encounter is a plot you can read at a glance, and every answer you give is scored so you know exactly which rules you still get wrong.
WHAT'S INSIDE
• 38 rule cards — the full COLREGs set in plain, examinable language, with the clauses that decide most encounters called out. • Lights and shapes — the complete night and day picture: power-driven, sailing, fishing, trawling, towing, not under command, restricted in ability to manoeuvre, constrained by draught, at anchor and aground. • Scenario drills — radar-style bearing plots showing your ship and the other vessel's bearing, range and heading, or the exact light picture you'd see at night. Decide the safe, lawful action and see why it is right. • Final test — 40 multiple-choice questions covering all 38 rules, fresh questions on every attempt, pass mark 95%. • Progress and weak spots — your accuracy per rule, so revision goes where it is needed instead of over what you already know. • Glossary — 60+ COLREGs terms and abbreviations, searchable and grouped by topic, for the moment you need "constrained by draught" or "risk of collision" defined properly.
WHO IT'S FOR
Deck cadets and officers revising for oral and written examinations, yachtmaster and RYA candidates, commercial skippers keeping current, and anyone who stands a watch and wants the rules to be instinct rather than recall.
BUY IT ONCE. KEEP IT.
One payment unlocks HelmChart in full — every rule card, light picture, drill and the final test. No subscription, no renewals, nothing locked behind a second purchase later.
NO ACCOUNT. NO TRACKING.
There is no sign-up, no email and no password. Your answers, scores and study record are stored on your own device only, never sent anywhere, and you can erase them at any time from the Progress page. HelmChart works completely offline.
IMPORTANT
HelmChart is a study aid for the International Regulations for Preventing Collisions at Sea. It is not a navigation instrument and must not be used for decisions at sea — always verify against the official IMO text and your own vessel's procedures.
Ratings & Reviews
What's new in this version: • All 38 COLREGs rules now covered — including Rules 1–4 (application, responsibility, definitions) and Parts A, B, D and E. • Full official wording for every rule — tap any rule card to read the complete text below the plain-language summary. • Rule wording checked and corrected against the official text, including Rules 3, 10, 27, 34, 37 and 38. • New final test: 40 multiple-choice questions covering every rule, fresh questions on every attempt, 95% pass mark. • Improved lights and shapes reference and glossary.
The developer, Eric Gosselin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Eric Gosselin
- Size
- 8.7 MB
- Category
- Education
- Compatibility
Requires iOS 15.5 or later.
- iPhone
Requires iOS 15.5 or later. - iPad
Requires iPadOS 15.5 or later. - iPod touch
Requires iOS 15.5 or later. - Mac
Requires macOS 12.4 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 26 more
- English, Arabic, Catalan, Czech, Danish, Dutch, Estonian, Finnish, French, Gaelic, German, Hebrew, Hungarian, Italian, Japanese, Korean, Latvian, Lithuanian, Norwegian Nynorsk, Persian, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish, Ukrainian
- Age Rating
4+
- 4+
- Copyright
- © @ 2026 EG Maritime Sea Consultant
