# Master-Nav: COLREGS IALA Tests — Practice Maritime Rules Daily

> Maritime navigation rules and buoyage system practice for mariners. (iPhone/iPad app by Peterjohn Chisholm.)

- Source: https://appshunter.io/ios/app/master-nav-colregs-iala-tests/id6758554000 (this page in markdown: same URL + `.md`)
- Developer: [Peterjohn Chisholm](https://appshunter.io/developer/1602390398)
- Category: Education, Navigation
- Price: Free
- Age rating: 4+
- Requires: iOS 17.6 · 305 MB
- Languages: American English
- Released: 2026-03-20
- Data updated: 2026-09-06
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/master-nav-colregs-iala-tests/id6758554000/reviews.md

## What is Master?

Master-Nav: COLREGS IALA Tests is a free practice app developed by a Master Mariner with 30 years of seagoing experience.

Test your knowledge of the USCG Navigation Rules and IALA Maritime Buoyage System  — the regulations every mariner needs to know.

A straightforward way to find out where you stand, identify gaps in your knowledge and track your progress over time.

Master COLREGS & IALA — the easy way.

## Key features

- USCG Navigation Rules practice
- IALA Maritime Buoyage System tests
- Knowledge gap identification
- Progress tracking
- Developed by Master Mariner

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/master-nav-colregs-iala-tests/id6758554000/reviews.md

### 5/5 — Amazing.

*2026-04-04*

Honestly, great app. I really recommend it to people who want to study effectively because textbooks don’t do it like this.

### 5/5 — Great app!!

*2026-03-22*

Great App / Good training /Challenging.
Excellent study tool .

## Frequently asked questions about Master

### What is Master-Nav primarily used for?

Master-Nav is used to practice and test your knowledge of USCG Navigation Rules and the IALA Maritime Buoyage System, essential regulations for mariners.

### Who developed Master-Nav?

Master-Nav was developed by Peterjohn Chisholm, a Master Mariner with 30 years of seagoing experience, ensuring practical and expert-level content.

### How does Master-Nav help users improve?

The app provides a straightforward way to assess your current knowledge, pinpoint areas needing improvement, and monitor your learning progress over time.

### Is Master-Nav available on multiple devices?

Currently, Master-Nav is supported on iPhones. Information regarding availability on other devices like Android or tablets is not provided.

### How often is Master-Nav updated?

The latest version of Master-Nav is 1.5, and it was last updated on June 15, 2026. This indicates a recent update, suggesting ongoing development.

### What is the age rating for Master-Nav?

Master-Nav has an age rating of 4+, making it suitable for a wide range of users interested in maritime education.

### Does Master-Nav have ads?

No, Master-Nav does not contain advertisements. It is a free app without any ad interruptions.

### Are there different subscription tiers for Master-Nav?

Master-Nav is a free application and does not offer subscription tiers. All features are available without any cost.

## Version history (last 5 releases)

### 1.5 — 2026-06-15

ROR International, Inland and IALA MBS exam practice tool, developed by a Master Mariner. Test your knowledge of the rules.

### 1.4 — 2026-05-31

Improved navigation-light graphics and animations on the vessel identification questions, plus a few display fixes and refinements.

### 1.3 — 2026-05-04

Q100 and Q300 mock exams matching the structure of actual USCG NMC releases — plus 400+ new questions added to the bank, including 223 illustration-based questions.

### 1.2 — 2026-04-11

New Rule 18 drag-to-order vessel priority questions, UI improvements and bug fixes.

### 1.1 — 2026-04-02

Updated graphics for Part D : sound signals.

## Apps similar to Master

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [CSM LearnStrike](https://appshunter.io/ios/app/csm-learnstrike/id6450264607) | — | Free | Education |
| [HMS ColRegCards](https://appshunter.io/ios/app/hms-colregcards/id6759050269) | — | Free | Education |
| [Maritime Master - Radar](https://appshunter.io/ios/app/maritime-master-radar/id6751800471) | 4.7 (3) | Free | Education |
| [Neptune: Navigation Rules](https://appshunter.io/ios/app/neptune-navigation-rules/id6756641315) | 5.0 (13) | Free | Education |
| [Sailor's Deck: COLREGS](https://appshunter.io/ios/app/sailors-deck-colregs/id6761303264) | 5.0 (1) | Free | Education |
| [Maritime Master](https://appshunter.io/ios/app/maritime-master/id6741146129) | — | Free | Education |

## More apps by Peterjohn Chisholm

- [Master-Nav](https://appshunter.io/ios/app/master-nav/id1602390396)
- [Master-Nav: IALA MBS](https://appshunter.io/ios/app/master-nav-iala-mbs/id6757947717)

All apps by Peterjohn Chisholm: https://appshunter.io/developer/1602390398

## Related topics

[colreg](https://appshunter.io/ios/topics/colreg) · [iala](https://appshunter.io/ios/topics/iala)

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*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 2026-09-06.*