---
title: "Master-Nav — App Overview"
url: https://marlvel.ai/apps/eu-pjcc-navmaster
category: Education
developer: Peterjohn Chisholm
platforms: ios, android
rating: 4.5 (241 ratings)
pricing: free
report_level: overview
generated: 2026-04-19
last_verified: "2026-04-19T03:04:05.961Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** Master-Nav simplifies the complex study of maritime navigation rules by applying cognitive learning techniques to the official COLREGS curriculum.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Education |
| Rating | 4.5 ★ (241) |
| Pricing | free |
| Platforms | iOS, Android |
| Latest Version (iOS) | 147 |
| Latest Version (Android) | M_N 5.3 |
| Developer | Peterjohn Chisholm |

<!-- SECTION: Summary -->
## What is Master-Nav?

Master-Nav is an educational tool designed to help mariners master the COLREGS through a structured, interactive learning system. Developed by a Master Mariner, the app replaces rote memorization with bite-sized content, mnemonics, and visual aids to improve information retention.

<!-- SECTION: Key Features -->
## Key Features

- **Step-by-Step Curriculum**: Guides users through COLREGS Parts A to D and Annex IV in a logical, sequential order rather than using random question banks.
- **Interactive Memory Aids**: Utilizes mnemonics and interactive visuals designed to support cognitive retention of complex regulations.
- **Adaptive Review System**: Automatically revisits incorrectly answered questions to ensure mastery of the rules.
- **Integrated Rule Reference**: Provides one-tap access to the full text of the relevant COLREGS rule from any question screen.

<!-- SECTION: Target Audience -->
## Who is it for?

Professional mariners and students preparing for maritime navigation examinations.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/master-nav/id1602390396?uo=2)
- [Google Play](https://play.google.com/store/apps/details?id=com.pjccappdev.master_nav&hl=en&gl=us)
- [Full Intelligence Report](https://marlvel.ai/apps/eu-pjcc-navmaster)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/eu-pjcc-navmaster).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*