# Mariner One > Master COLREGS, ROR cards, lights, flags, signals, Morse & maritime skills. Canonical page: [https://chrome-stats.com/d/com.dwall.marinerone](https://chrome-stats.com/d/com.dwall.marinerone) ## Overview - **ID:** `com.dwall.marinerone` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** DWALL DEVELOPERS - **Category:** EDUCATION - **Downloads:** 24 - **Version:** 1.0.15 - **Last updated:** 2026-09-25 - **First published:** 2026-08-14 - **Publisher country:** IN - **Size:** 90 MB - **Data as of:** 2026-09-26 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.dwall.marinerone) - **Website:** [https://mariner-one.web.app/index.html](https://mariner-one.web.app/index.html) - **Privacy policy:** [https://mariner-one.web.app/privacy-policy.html](https://mariner-one.web.app/privacy-policy.html) ## Description # Mariner One – Maritime Learning & Reference

Mariner One is a comprehensive maritime learning and reference app designed for nautical officers, cadets, maritime students, and anyone preparing for a career at sea.

Study essential maritime knowledge anytime, anywhere — whether you are onboard, preparing for examinations, or refreshing your knowledge before going on watch.

## ⚓ COLREGS Rules

Study the International Regulations for Preventing Collisions at Sea (COLREGS) in a clear and easy-to-use format.

Review individual rules, understand their application, and strengthen your knowledge of collision-prevention requirements.

## 🃏 ROR Cards

Practice Rules of the Road using visual day and night ROR cards.

Use the cards for quick revision and test your ability to identify the correct navigation situation and applicable rule.

## 🚢 Navigation Lights

Learn and identify navigation lights and vessel configurations.

Practice recognizing lights displayed by different types of vessels and understand their significance at sea.

## 🚩 Flags

Explore maritime signal flags and learn their meanings and applications.

Useful for quick reference and revision.

## 🔊 Sound Signals

Study the sound signals used under COLREGS and their meanings.

Quickly review signals used in situations such as manoeuvring, restricted visibility, and warning other vessels.

## 📡 Morse Code

Practice Morse code and improve your ability to recognize and understand maritime communications.

## 🗣 Phonetic Alphabet

Learn the International Maritime Signal Flags phonetic alphabet for clear and effective communication.

## 🆘 Distress Signals

Review internationally recognized maritime distress signals and their meanings.

## 📚 Study & Track Your Progress

Mariner One helps you continue your learning wherever you are.

Your study progress can be saved to your account and synchronized so you can continue your preparation over time.

## 👨‍✈️ Built for Mariners

Whether you are a:

• Master Mariner
• Chief Officer
• Deck Officer
• Deck Cadet
• Nautical Science student
• Maritime professional
• Seafarer preparing for examinations

Mariner One provides essential maritime knowledge in one convenient application.

## 🌊 Learn. Practice. Navigate.

Use Mariner One as a companion for maritime study, examination preparation, and quick reference at sea.

Some features and learning content may require a premium subscription.

Mariner One is an educational and reference application and is not a substitute for official nautical publications, regulations, charts, or onboard procedures. ## Rankings - #2,581,812 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.USE_BIOMETRIC` - `android.permission.USE_FINGERPRINT` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.dwall.marinerone.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` - `com.google.android.providers.gsf.permission.READ_GSERVICES` ## Similar extensions and apps - [Navitime Marine](https://chrome-stats.com/d/app.navitime.mobile) — 48 users - [HMS ColregsCards](https://chrome-stats.com/d/com.hms.colregscards) — 53 users - [Maritime Master](https://chrome-stats.com/d/com.botletop.maritme.master) — 2,340 users - [Colregs-Pro](https://chrome-stats.com/d/com.flashcards.colregspro) — 1,198 users - [ColRegs Cards](https://chrome-stats.com/d/com.sahid.rorcards) — 20,835 users - [COLREG 72: Safety at Sea](https://chrome-stats.com/d/edu.SmirnovYury.EngVesselLights) — 131,284 users, 4.80 / 5 - [ColRegs: Rules of the Road](https://chrome-stats.com/d/com.iglimpse.rulesofroad) — 8,190 users, 3.67 / 5 - [Maritime Master - OOW](https://chrome-stats.com/d/com.bottletopstudios.maritime.master.oow) — 63 users - [ColRegs: Nav Lights & Shapes](https://chrome-stats.com/d/stuart.test.com) — 9,593 users, 4.67 / 5 - [Nav Rules: COLREGS Quiz](https://chrome-stats.com/d/com.moon.navrules) — 1 users - [Marinus](https://chrome-stats.com/d/com.marinus.marinuspro) — 36,663 users - [Master-Nav: Colregs](https://chrome-stats.com/d/com.pjccappdev.master_nav) — 33,823 users, 4.52 / 5 --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.dwall.marinerone)