# Master-Nav

> NAV RULES - the easy way!

Canonical page: [https://chrome-stats.com/d/id1602390396](https://chrome-stats.com/d/id1602390396)

## Overview

- **ID:** `id1602390396`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Peterjohn Chisholm
- **Category:** Education
- **Rating:** 4.70 / 5 (97 ratings)
- **Version:** 1.50
- **Last updated:** 2026-06-15
- **First published:** 2022-01-08
- **Size:** 117 MB
- **Data as of:** 2026-09-22
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/master-nav/id1602390396)
- **Website:** [http://master-nav.com/](http://master-nav.com/)
- **Privacy policy:** [https://www.freeprivacypolicy.com/live/ce6f5488-c713-48e5-b14b-27deddec6560](https://www.freeprivacypolicy.com/live/ce6f5488-c713-48e5-b14b-27deddec6560)

## Description

Master-Nav is a progressive COLREGS learning system developed by a Master Mariner. It breaks complex rules into bite-sized chunks and uses mnemonics and interactive visuals tailored to how the brain retains information.

It guides you step by step through Parts A-D and Annex IV, offering over 1000 questions in multiple formats. Wrong answers are revisited, a dedicated Practice section tracks your right, wrong, and unanswered responses, and you can access the relevant rule from any question with a tap.

## Rankings

- #136,185 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1602390396)