# Maritime Master - OOW — Radar, COLREGs, OOW & Calcs > Maritime study and reference app for officers and cadets. (iPhone/iPad app by MARITIME MASTER LIMITED.) - Source: https://appshunter.io/ios/app/maritime-master-oow/id6748314674 (this page in markdown: same URL + `.md`) - Developer: [MARITIME MASTER LIMITED](https://appshunter.io/developer/1107589346) - Category: Education, Utilities - Price: $9.99 - Rating: 5.00/5 from 1 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 21 MB - Languages: American English - Released: 2025-08-01 - Data updated: 2026-08-16 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/maritime-master-oow/id6748314674/reviews.md ## What is Maritime Master? Study faster. Sail safer. Practice radar plotting, run bridge calculations, and master COLREGs, all in one app built for OOW prep and day-to-day reference. Designed for deck cadets, maritime students, and working officers (OOW, 3/O, 2/O). Radar plotting simulator: Add multiple targets with custom courses and speeds Automatic CPA/TCPA with clear high-risk warnings Relative motion vectors and target trails to visualise situations Training disclaimer: This simulator is for education only and must not be used for real-world navigation or collision-avoidance decisions. Calculation suite: Navigation: Speed–Time–Distance, ETA, Dead Reckoning, Course & Distance (Rhumb Line & Great Circle), Set & Drift & Fix Position Terrestrial & Celestial: Compass Error, Parallel Indexing, Object Distance, Advance & Transfer, Meridian Passage & LOP sight-reduction helper Stability & Ship Construction: FSE correction, Mean Draft, TPC/LCF usage, Trim & VCG Meteorology: True Wind, Barometer corrections, Beaufort scale converter & Tides and Currents Essential learning & reference library: Regulations: SOLAS, MARPOL, STCW, ISM Code, ISPS Code, GMDSS (quick-reference guides) Core nautical knowledge: Passage planning; ECDIS & charts; basic stability; compass deviation Procedures: Emergency procedures; SOPEP & SMPEP; checklists for safe watchkeeping; logbook entries; equipment handover Electronic navigation: AIS data interpretation; ECDIS functions; AIS/MMSI code reference Master the Rules of the Road (COLREGs): Shapes and sound signals International Code of Signals (ICOS) IALA buoyage systems (A & B) Test yourself & prep for exams: Flashcards, ICOS Hangman, and a Buoy Night-Light game OOW progress tracker. Who is it for? Maritime students & deck cadets: build a strong foundation Officers in training: prepare confidently for OOW certification Active deck officers: quick reference, calculation practice, and knowledge refreshers Anyone who wants to learn more about maritime and OOW Download Maritime Master - OOW and advance your maritime knowledge with confidence. ## Key features - Radar plotting simulator - Navigation and ship calculation suite - Nautical regulations library - COLREGs mastery tools - Interactive learning games - OOW progress tracker ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/maritime-master-oow/id6748314674/reviews.md ### 5/5 — Awesome! *2025-12-01* There isn't a ton of heavy theory, but as a visual learner it really helps me understand and remember things better. It’s more of a quick reference and refresher tool than a hardcore theory app, and it does that job brilliantly. Great tool for OOW. **Developer response:** Thanks so much for the awesome review, Davos1987! You’ve described exactly what we set out to build with Maritime Master, a visual, bite-size refresher you can dip into in quick sessions, rather than a heavy theory book. We’re really glad it’s helping you understand and remember things for OOW, we wanted an app that helps in both exam prep and on-the-job learning. Fair winds and following seas, and thanks again for using the app! ### 5/5 — Great resource for officers *2025-08-30* This is a great app for quick references and calculations. I will be recommending this to my students. It’s a good app to help in exam preparation and officers in training. It would be good to see some more interactive sections as that does really aid learning. The whole app works offline which is a bonus! ## Frequently asked questions about Maritime Master ### What is Maritime Master used for? Maritime Master is an educational app designed for maritime professionals and students. It helps users study radar plotting, perform various navigation and ship calculations, and master the Rules of the Road (COLREGs). ### What types of calculations can Maritime Master perform? Maritime Master offers a suite of calculations including Speed–Time–Distance, ETA, Dead Reckoning, Course & Distance, Set & Drift, and Fix Position. It also covers terrestrial, celestial, stability, and meteorological calculations. ### Does Maritime Master include COLREGs information? Yes, Maritime Master provides comprehensive coverage of the Rules of the Road (COLREGs), including shapes and sound signals, the International Code of Signals (ICOS), and IALA buoyage systems (A & B). ### How does Maritime Master help with exam preparation? The app includes features like flashcards, ICOS Hangman, a Buoy Night-Light game, and an OOW progress tracker to help users test their knowledge and prepare for certification exams. ### What maritime regulations are covered in Maritime Master? Maritime Master includes quick-reference guides for essential regulations such as SOLAS, MARPOL, STCW, ISM Code, ISPS Code, and GMDSS. ### Is Maritime Master available on multiple devices? Yes, Maritime Master is supported on both iPhone and iPad devices, allowing users to study and reference information across different Apple platforms. ### What is the price of Maritime Master? Maritime Master is a paid application, with a price of $9.99. This one-time purchase grants access to all its features and content. ### How often is Maritime Master updated? The app was last updated on February 25, 2026, indicating a commitment to maintaining and improving its content and functionality. Users can expect regular updates to reflect current maritime standards and practices. ## Version history (last 5 releases) ### 2.3.3 — 2026-07-01 6-Month Content Review Every six months we re-check all learning content against the latest IMO conventions and this is that update. We've reviewed every reference page, calculator and quiz, and corrected what needed it: GMDSS sea areas (2024 SOLAS), COLREG distress signals, MARPOL discharge rules, the sunrise/sunset calculator and more. We've also added quick links to the full Maritime Master app family in the Info tab. Fair winds! ### 2.3.2 — 2026-02-25 Every six months, we review all app content to ensure it is up to date and correct. We work throughout the year to fix bugs and issues, but this is the time we focus on learning content and make sure it is accurate and up to date for all our users. ### 2.3.1 — 2025-12-29 New icon for the new year! ### 2.3.0 — 2025-12-01 Shiny new app icon – Hoisted a fresh ensign so you can spot us easily on your home screen. Improved iPad layout in landscape – Things now look shipshape when you turn your iPad on its side. Keyboard stowaway fixed – The keyboard now dismisses properly on calculation screens, instead of lingering like an uninvited deckhand. New Features on Board IALA Buoyage Nav Lights – Brush up on buoyage light patterns so you always know which side to pass on. Navigation lights at night – Learn how vessels should light up after dark, so you can stay safe on the midnight watch. Other small bug fixes and improvements. Better support for iOS 26 features. ### 2.2.1 — 2025-11-12 Bug fixes and improvements - Fixed an issue with the quiz questions screen ## Apps similar to Maritime Master | App | Rating | Price | Category | | --- | --- | --- | --- | | [Master-Nav: IALA MBS](https://appshunter.io/ios/app/master-nav-iala-mbs/id6757947717) | 5.0 (1) | $0.99 | Education | | [Bridgedeck Study](https://appshunter.io/ios/app/bridgedeck-study/id6776595753) | — | Free | Education | | [The OOW Bible](https://appshunter.io/ios/app/the-oow-bible/id6760291715) | — | Free | Education | | [Phrasal Verb Drills](https://appshunter.io/ios/app/phrasal-verb-drills/id6739436021) | — | $9.99 | Education | | [Maritime Masters](https://appshunter.io/ios/app/maritime-masters/id6466786574) | — | Free | Education | | [SOLAS4](https://appshunter.io/ios/app/solas4/id6468890931) | — | $1.99 | Education | ## More apps by MARITIME MASTER LIMITED - [Tower Defence - Remarkable](https://appshunter.io/ios/app/tower-defence-remarkable/id1643433093) - [TransPart - Component Search](https://appshunter.io/ios/app/transpart-component-search/id6443449842) - [Kaleidoscope AR](https://appshunter.io/ios/app/kaleidoscope-ar/id6482973721) - [Telegraph - API Client](https://appshunter.io/ios/app/telegraph-api-client/id6503224281) - [Maritime Master](https://appshunter.io/ios/app/maritime-master/id6741146129) - [Maritime Master Whiteboard](https://appshunter.io/ios/app/maritime-master-whiteboard/id6745555144) All apps by MARITIME MASTER LIMITED: https://appshunter.io/developer/1107589346 --- *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 2026-08-16.*