# HelmChart - COLREGs — Right of way, decoded. > Interactive study aid for International Regulations for Preventing Collisions at Sea. (iPhone/iPad app by Eric Gosselin.) - Source: https://appshunter.io/ios/app/helmchart-colregs/id6813428301 (this page in markdown: same URL + `.md`) - Developer: [Eric Gosselin](https://appshunter.io/developer/6811883510) - Category: Education, Navigation - Price: $2.99 - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.5 · 8 MB - Languages: American English, Arabic, Catalan, Czech, Danish, Dutch, Estonian, Finnish, French (France), Scottish Gaelic and 17 more - Released: 2026-09-22 - Data updated: 2026-10-10 - Monetization: paid ## What is HelmChart? 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. ## Key features - 38 rule cards in plain language - Lights and shapes diagrams - Radar-style scenario drills - 40-question final test - Progress tracking per rule - Searchable COLREGs glossary ## Is HelmChart safe? Not enough ratings yet to assess HelmChart. ## Is HelmChart legit? HelmChart - COLREGs appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for HelmChart is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Frequently asked questions about HelmChart ### What is HelmChart? HelmChart is a study aid designed to help users learn and master the International Regulations for Preventing Collisions at Sea (COLREGs). It uses interactive cards, drills, and tests to make the rules easier to understand and remember. ### Who is HelmChart for? This app is ideal for deck cadets, officers studying for exams, yachtmaster and RYA candidates, commercial skippers, and anyone who operates a vessel and wants to have a strong understanding of collision avoidance rules. ### How does HelmChart help me learn the rules? It breaks down each rule into digestible cards, provides visual aids for lights and shapes, and offers scenario drills that simulate real-life encounters. Progress tracking highlights which rules you need to focus on for revision. ### Does HelmChart have ads? No, HelmChart does not contain advertisements. The app is purchased once for full access to all its features. ### What devices does HelmChart support? HelmChart is available for iPhone, iPad, and iPod devices, making it accessible for study on the go. ### How often is HelmChart updated? The app was last updated on September 26, 2026, indicating ongoing support and potential for future improvements or content additions. ### Can I use HelmChart offline? Yes, HelmChart works completely offline. There is no need for an internet connection to study the rules, practice drills, or take tests. ### What is the price of HelmChart? HelmChart is available for a one-time purchase of $2.99. This single payment unlocks all features without any subscriptions or additional in-app purchases. ## Version history (last 2 releases) ### 1.1 — 2026-09-26 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. ### 1.0 — 2026-09-23 No release notes. ## More apps by Eric Gosselin - [Signal Lamp: Naval Signalling](https://appshunter.io/ios/app/signal-lamp-naval-signalling/id6816638511) - [Tactical Manoeuvres Training](https://appshunter.io/ios/app/tactical-manoeuvres-training/id6816646691) - [TMT 1241 Tactical Comm](https://appshunter.io/ios/app/tmt-1241-tactical-comm/id6816656777) - [The Practical Navigator](https://appshunter.io/ios/app/the-practical-navigator/id6816661953) All apps by Eric Gosselin: https://appshunter.io/developer/6811883510 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-10.*