# Nav Rules: COLREGS & Inland — Signals, knots & boat crew

> Signals, knots & boat crew (iPhone/iPad app by SEDX LLC.)

- Source: https://appshunter.io/ios/app/nav-rules-colregs-and-inland/id6776329571 (this page in markdown: same URL + `.md`)
- Developer: [SEDX LLC](https://appshunter.io/developer/6776048808)
- Category: Education
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 15.1 · 84 MB
- Languages: American English, French (France), German (Germany), Hindi, Indonesian, Japanese, Korean, European Portuguese, European Spanish
- Released: 2026-07-01
- Data updated: 2026-11-05

## What is Nav Rules?

The complete Navigation Rules, International (COLREGS) and Inland, side by side, rule by rule. Plus the Boat Crew Seamanship Manual and the International Code of Signals. Three public domain maritime references in one offline library.

Not a government app. This is an independent reference, not affiliated with or endorsed by the US Coast Guard, the USCG Auxiliary, NGA, or the Department of Homeland Security. Its content comes from these three official public domain publications, and no other source is used:
• Navigation Rules and Regulations Handbook (USCG Navigation Center): https://www.navcen.uscg.gov/navigation-rules-amalgamated
• Boat Crew Seamanship Manual (USCG, hosted by the U.S. Coast Guard Auxiliary): https://rdept.cgaux.org/documents/BoatCrewHandbooks/16114_5C%20BoatCrew%20Seamanship%20Manual.pdf
• International Code of Signals, Pub 102 (NGA): https://msi.nga.mil/Publications/ICOS

No ads, no subscription, no account, no data sharing.

NAVIGATION RULES HANDBOOK (COLREGS AND INLAND)
The complete International Rules (72 COLREGS) and Inland Rules (33 CFR 83), presented side by side rule by rule exactly as the official handbook does, with a quick toggle to show only International, only Inland, or both at once. Parts A through F plus Annexes I through V. This is the whole rules of the road text, not a summary or a quiz bank.

BOAT CREW SEAMANSHIP MANUAL
The full manual: boat handling, towing, search and rescue, heavy weather, navigation, sound signals, anchoring. Every chapter, fully searchable.

INTERNATIONAL CODE OF SIGNALS (NGA PUB 102)
All 40 signal flags (26 letters, 10 numerals, 3 substitutes and the answering pennant) with their single letter meanings, plus the two letter Distress, SAR, Maneuvering and Weather sections.

WHO IT IS FOR
• Captains preparing for a USCG OUPV (six pack) or Master license
• Anyone studying the rules of the road for a licence exam
• Coast Guard Auxiliarists working through Boat Crew Member or Coxswain qualifications
• Recreational boaters and sailors who want the real rules at a glance, not a paraphrase
• Anyone responsible for the safe operation of a vessel

WHY THIS ONE
The complete text of all three references, full search, and bookmarks are free. One optional purchase adds the interactive study tools, with no subscription.

PRO TOOLS, ONE OPTIONAL PURCHASE

SIDE BY SIDE RULE COMPARISON
International (72 COLREGS) and Inland (33 CFR 83) shown in parallel for every rule. Toggle between Both, International, and Inland. This is the view license candidates need, because the exam asks which jurisdiction says what.

KNOT LIBRARY
Bowline, cleat hitch, clove hitch, square knot, sheet bend, round turn and two half hitches, anchor bend. Each with its use case, the verbatim Boat Crew procedure, and a deep link back to the manual section that covers it.

SIGNAL FLAG DECODER
A 40 flag grid with the phonetic name and glyph for every flag, plus a multi flag hoist decoder. Type the hoist, get the meaning. Works offline.

QUALIFICATION CHECKLIST
42 Personnel Qualification Standards tasks across 10 categories including helmsmanship, navigation, engineering, communications, seamanship, first aid and damage control. Check off each task as you complete it. Every task deep links to the relevant Boat Crew Seamanship section so you can study it right there.

OFFLINE BY DESIGN
• Fully offline, no signal needed underway
• Dark, low light interface for the wheelhouse at night
• Fast search across all three references at once
• Bookmarks and recently viewed sections
• Progress saved on your device

SAFETY DISCLAIMER
This app is a study and reference tool. NOT FOR PRIMARY NAVIGATION. Consult current official publications, Local Notices to Mariners, and current charts when actually underway. Verify any operationally significant rule or procedure against the current source.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Coxswain Pro | $1.99 | one-time |


## Is Nav Rules safe?

Not enough ratings yet to assess Nav Rules.

## Is Nav Rules legit?

Nav Rules: COLREGS & Inland appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Nav Rules is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.0.15 — 2026-10-27

Fixes a crash when double tapping a zoomed figure to zoom back out. The Pro upgrade screen also gets clearer wording and better spacing near the bottom edge. Your bookmarks and study progress carry over as usual.

### 1.0.14 — 2026-09-26

The app now waits until you have used it on a few different days before asking for a rating, and the rating link now opens the App Store review page. Also adds support for the latest version of iOS. Your bookmarks and study progress carry over as usual.

### 1.0.12 — 2026-09-06

Renamed. Coxswain HQ is now USCG Navigation Rules Handbook, after the reference at its core. Same app, same free library, same one time unlock. Nothing was removed.

New nautical chart backdrop throughout: compass rose, rhumb lines, soundings and a dashed channel.

Polish and small fixes.

### 1.0.11 — 2026-07-02

Fixes an issue that prevented the Pro unlock purchase from completing.

### 1.0.10 — 2026-07-01

No release notes.

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## Related topics

[uscg navigation rules handbook](https://appshunter.io/ios/topics/uscg-navigation-rules-handbook) · [nav rules](https://appshunter.io/ios/topics/nav-rules) · [navigation rules](https://appshunter.io/ios/topics/navigation-rules) · [uscg](https://appshunter.io/ios/topics/uscg)

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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 2026-11-05.*