---
title: "Master-Nav: Colregs - Reviews, Revenue and Downloads in South Africa | Apple App Store"
description: "Master-Nav is a progressive COLREGS learning system developed by a Master Mariner. The COLREGS are notoriously difficult to learn and retain — Master-Nav makes it significantly easier through an inter"
---

# Master-Nav: Colregs — South Africa
> COLREGS - the easy way!

![Master-Nav App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/43/1b/47/431b47ff-5e42-71f9-0f69-a324bbc28ef7/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png)

**Developer:** [Peterjohn Chisholm](https://apptail.io/developer/peterjohn-chisholm-xgab)
**Category:** Education
**Rating:** 4.9/5 (22 ratings)
**Price:** Free
**Bundle ID:** eu.pjcc.NavMaster
**Store:** Apple App Store
**Country:** South Africa
**Version:** 1.48 (released 2026-05-31)
**Original Release:** 2022-01-08
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/za/app/app/id1602390396)
**AppTail Page:** [https://apptail.io/app/master-nav-VYXc/south-africa](https://apptail.io/app/master-nav-VYXc/south-africa)

## Master-Nav Description
Master-Nav is a progressive COLREGS learning system developed by a Master Mariner. The COLREGS are notoriously difficult to learn and retain — Master-Nav makes it significantly easier through an interactive system built around how your brain actually works.

Instead of guessing through random question banks, Master-Nav guides you step by step through every rule from start to finish. Wrong answers are revisited until the rules stick — properly.

Complex regulations are broken down into learnable chunks — bite-sized sections supported by mnemonics, memory aids and interactive visuals designed around how the brain actually retains information.

Every incorrect answer is shown graphically alongside the correct one — immediately clear, no confusion. And with a single tap, the relevant COLREGS rule is accessible from any question at any time.

Master-Nav covers COLREGS Parts A to D — General, Steering & Sailing, Lights & Shapes and Sound & Light Signals — plus Annex IV Distress Signals. Over 1000 questions in multiple formats, with a dedicated Practice Section that tracks right, wrong and unanswered so you always know where to focus.

COLREGS — the easy way.

## Master-Nav Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/db/05/bc/db05bc7a-3949-9811-c915-e72d8216313b/01.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/7f/f6/c7/7ff6c7e3-b109-c096-957e-ddb0a0650b8b/03.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/87/84/37/87843798-ee24-9ebc-d99c-0aa16e197150/03.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/b1/71/dd/b171dd94-afbb-577c-1386-89b6e974fc23/05.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/4f/2b/c3/4f2bc366-fbcb-13f1-31e5-ba1a81a4367a/09.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/52/1b/9d/521b9d28-8db5-9136-63ff-a71a7f5122b8/07.png/1284x2778.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/d2/a2/c8/d2a2c897-a46d-e47c-9228-7e6bc773f233/02.png/1284x2778.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/80/fc/3f/80fc3f9c-2ac2-333d-5017-c43ce41f31b5/06.png/1284x2778.png)
- [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ea/47/82/ea4782a6-b609-651c-29d7-dc59cb23e0a7/08.png/1284x2778.png)

## Master-Nav Rating Breakdown in South Africa
- 5 stars: 20 (91%)
- 4 stars: 1 (5%)
- 3 stars: 1 (5%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)

## Master-Nav Reviews in South Africa

### ***** "Excellent"
Best thing since sliced bread! Very convenient, good lay out and easy to understand. Worth every penny.
-- Tiaan107, 2022-05-26

### ***** "Excellent!!!!"
I’ve been looking for a COLREGS App that goes into enough details regarding the lights to help me learn for my OOW oral exam, and I would definitely say this is the best app for that by far. It goes very in depth with the lights. It teaches you and test you on everything in such an easy way to understand. Its worth every penny! ⚓️
-- Kelvin.Smith88, 2022-01-15

[View all Master-Nav reviews and detailed analytics on AppTail](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=reviews)


## Master-Nav Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | Italy | Education | #2 |
| Top Paid | South Africa | Education | #24 |
| Top Paid | Spain | Education | #29 |
| Top Paid | Italy | Overall | #34 |
| Top Paid | Canada | Education | #61 |
| Top Paid | Philippines | Education | #82 |
| Top Paid | Australia | Education | #92 |
| Top Paid | Greece | Education | #115 |
| Top Paid | India | Education | #132 |
| Top Paid | Nigeria | Education | #135 |
| Top Paid | Singapore | Education | #153 |
| Top Paid | South Africa | Overall | #172 |
| Top Paid | Romania | Education | #193 |
| Top Paid | United Kingdom | Education | #197 |
| Top Paid | Czechia | Education | #213 |
| Top Paid | United Arab Emirates | Education | #218 |
| Top Paid | Poland | Education | #234 |
| Top Paid | Ukraine | Education | #260 |
| Top Paid | Malaysia | Education | #269 |
| Top Paid | New Zealand | Education | #311 |
| Top Paid | Saudi Arabia | Education | #348 |
| Top Paid | Finland | Education | #352 |
| Top Paid | Spain | Overall | #357 |
| Top Paid | Ireland | Education | #357 |
| Top Paid | Hungary | Education | #383 |
| Top Paid | Netherlands | Education | #410 |
| Top Paid | Egypt | Education | #412 |
| Top Paid | Indonesia | Education | #446 |
| Top Paid | Belgium | Education | #458 |
| Top Paid | Portugal | Education | #469 |

## Master-Nav Discovered Keywords
- colreg 72

## Apps Similar to Master-Nav
- [Sea Trials - USCG License Exam](https://apptail.io/app/sea-trials-uscg-license-exam-evo/south-africa)
- [AMC Buoyage System (IALA)](https://apptail.io/app/amc-buoyage-system-iala-kBD/south-africa)
- [COLREG 72: safety at sea](https://apptail.io/app/colreg-72-safety-at-sea-yUcd/south-africa)
- [Sailing Quiz HD](https://apptail.io/app/sailing-quiz-hd-adme/south-africa)
- [Marinus: maritime rules](https://apptail.io/app/marinus-maritime-rules-Wxxe/south-africa)
- [The Nautical School ExamTutor+](https://apptail.io/app/the-nautical-school-examtutor-puTe/south-africa)
- [USCG Exam Prep](https://apptail.io/app/uscg-exam-prep-Vdbf/south-africa)
- [Shellback](https://apptail.io/app/shellback-mebf/south-africa)
- [Official MCA guidance](https://apptail.io/app/official-mca-guidance-dDpo/south-africa)

## Master-Nav Available In
- [United Kingdom](https://apptail.io/app/master-nav-VYXc/united-kingdom)
- [United States](https://apptail.io/app/master-nav-VYXc/united-states)
- [Australia](https://apptail.io/app/master-nav-VYXc/australia)
- [Canada](https://apptail.io/app/master-nav-VYXc/canada)
- [South Africa](https://apptail.io/app/master-nav-VYXc/south-africa)
- [France](https://apptail.io/app/master-nav-VYXc/france)
- [India](https://apptail.io/app/master-nav-VYXc/india)
- [Philippines](https://apptail.io/app/master-nav-VYXc/philippines)
- [Germany](https://apptail.io/app/master-nav-VYXc/germany)
- [Italy](https://apptail.io/app/master-nav-VYXc/italy)
- [Malaysia](https://apptail.io/app/master-nav-VYXc/malaysia)
- [Spain](https://apptail.io/app/master-nav-VYXc/spain)
- [Netherlands](https://apptail.io/app/master-nav-VYXc/netherlands)
- [Sweden](https://apptail.io/app/master-nav-VYXc/sweden)
- [United Arab Emirates](https://apptail.io/app/master-nav-VYXc/united-arab-emirates)
- [New Zealand](https://apptail.io/app/master-nav-VYXc/new-zealand)
- [Brazil](https://apptail.io/app/master-nav-VYXc/brazil)
- [Finland](https://apptail.io/app/master-nav-VYXc/finland)
- [Greece](https://apptail.io/app/master-nav-VYXc/greece)
- [Hungary](https://apptail.io/app/master-nav-VYXc/hungary)
- [Ireland](https://apptail.io/app/master-nav-VYXc/ireland)
- [Czechia](https://apptail.io/app/master-nav-VYXc/czechia)
- [Thailand](https://apptail.io/app/master-nav-VYXc/thailand)
- [Türkiye](https://apptail.io/app/master-nav-VYXc/turkey)
- [Ukraine](https://apptail.io/app/master-nav-VYXc/ukraine)
- [Austria](https://apptail.io/app/master-nav-VYXc/austria)
- [Malta](https://apptail.io/app/master-nav-VYXc/malta)
- [Argentina](https://apptail.io/app/master-nav-VYXc/argentina)
- [Egypt](https://apptail.io/app/master-nav-VYXc/egypt)
- [Norway](https://apptail.io/app/master-nav-VYXc/norway)
- [Switzerland](https://apptail.io/app/master-nav-VYXc/switzerland)
- [Taiwan](https://apptail.io/app/master-nav-VYXc/taiwan)
- [Kenya](https://apptail.io/app/master-nav-VYXc/kenya)
- [Poland](https://apptail.io/app/master-nav-VYXc/poland)
- [Mexico](https://apptail.io/app/master-nav-VYXc/mexico)
- [Bulgaria](https://apptail.io/app/master-nav-VYXc/bulgaria)
- [Russia](https://apptail.io/app/master-nav-VYXc/russia)
- [Vietnam](https://apptail.io/app/master-nav-VYXc/vietnam)
- [Belgium](https://apptail.io/app/master-nav-VYXc/belgium)
- [Singapore](https://apptail.io/app/master-nav-VYXc/singapore)
- [North Macedonia](https://apptail.io/app/master-nav-VYXc/north-macedonia)
- [Azerbaijan](https://apptail.io/app/master-nav-VYXc/azerbaijan)
- [Brunei](https://apptail.io/app/master-nav-VYXc/brunei)
- [Belarus](https://apptail.io/app/master-nav-VYXc/belarus)
- [Chile](https://apptail.io/app/master-nav-VYXc/chile)
- [China](https://apptail.io/app/master-nav-VYXc/china)
- [Colombia](https://apptail.io/app/master-nav-VYXc/colombia)
- [Denmark](https://apptail.io/app/master-nav-VYXc/denmark)
- [Dominican Republic](https://apptail.io/app/master-nav-VYXc/dominican-republic)
- [Algeria](https://apptail.io/app/master-nav-VYXc/algeria)
- [Ecuador](https://apptail.io/app/master-nav-VYXc/ecuador)
- [Estonia](https://apptail.io/app/master-nav-VYXc/estonia)
- [Hong Kong SAR China](https://apptail.io/app/master-nav-VYXc/hong-kong)
- [Croatia](https://apptail.io/app/master-nav-VYXc/croatia)
- [Indonesia](https://apptail.io/app/master-nav-VYXc/indonesia)
- [Israel](https://apptail.io/app/master-nav-VYXc/israel)
- [Iceland](https://apptail.io/app/master-nav-VYXc/iceland)
- [Japan](https://apptail.io/app/master-nav-VYXc/japan)
- [South Korea](https://apptail.io/app/master-nav-VYXc/south-korea)
- [Kuwait](https://apptail.io/app/master-nav-VYXc/kuwait)
- [Kazakhstan](https://apptail.io/app/master-nav-VYXc/kazakhstan)
- [Lebanon](https://apptail.io/app/master-nav-VYXc/lebanon)
- [Sri Lanka](https://apptail.io/app/master-nav-VYXc/sri-lanka)
- [Lithuania](https://apptail.io/app/master-nav-VYXc/lithuania)
- [Luxembourg](https://apptail.io/app/master-nav-VYXc/luxembourg)
- [Latvia](https://apptail.io/app/master-nav-VYXc/latvia)
- [Nigeria](https://apptail.io/app/master-nav-VYXc/nigeria)
- [Nepal](https://apptail.io/app/master-nav-VYXc/nepal)
- [Peru](https://apptail.io/app/master-nav-VYXc/peru)
- [Pakistan](https://apptail.io/app/master-nav-VYXc/pakistan)
- [Portugal](https://apptail.io/app/master-nav-VYXc/portugal)
- [Romania](https://apptail.io/app/master-nav-VYXc/romania)
- [Saudi Arabia](https://apptail.io/app/master-nav-VYXc/saudi-arabia)
- [Slovenia](https://apptail.io/app/master-nav-VYXc/slovenia)
- [Slovakia](https://apptail.io/app/master-nav-VYXc/slovakia)
- [Tunisia](https://apptail.io/app/master-nav-VYXc/tunisia)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*