# ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS — Complete Reference & Lookup

> Electronic nautical chart symbols and abbreviations reference guide. (iPhone/iPad app by The Other Hat.)

- Source: https://appshunter.io/ios/app/electronic-nautical-chart-symbols-and-abbreviations/id712286784 (this page in markdown: same URL + `.md`)
- Developer: [The Other Hat](https://appshunter.io/developer/573973071)
- Category: Navigation, Reference
- Price: $1.99
- Rating: 1.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 57 MB
- Languages: American English
- Released: 2013-10-31
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/electronic-nautical-chart-symbols-and-abbreviations/id712286784/reviews.md

## What is ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS?

REFERENCE GUIDE TO THE SYMBOLS USED ON ELECTRONIC (ECDIS) NAUTICAL CHARTS SPECIFIED BY THE INTERNATIONAL HYDROGRAPHIC ORGANIZATION (IHO).

************ FEATURES and BENEFITS ************
- Perfect for reference, learning & revision 
- Hi-res graphics
- Tap & Enlarge feature for greater detail
- Fully searchable index to all the symbols
- Always with you on your iPhone or iPad
- No internet connection needed

************ Plus FREE Bonus Content from "Safe Skipper" ************  

"ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS" provides quick reference to the "INT 1" symbols specified by the International Hydrographic Organization (IHO).

There are five main sections in this app, each with lettered sub-sections organized into categories to guide users through the hundreds of symbols. The main sections are: 

GENERAL - chart layouts, positions, distances, directions and compass. 

TOPOGRAPHY - landmarks, ports and coastal land features. 

HYDROGRAPHY - tides, currents, depths, nature of the seabed, underwater obstructions, tracks, areas, limits and hydrographic terms. 

NAVIGATION AIDS & SERVICES - lights, buoys, fog signals, radar, radio, services and small craft facilities. 

INDEX & ABBREVIATIONS - international abbreviations and index to symbols and abbreviations. 

************* FREE Bonus Content from "Safe Skipper" ***************************** 
A bonus section has tips on how to deal with emergencies including: Abandon ship; Dismasting; Distress Signals; Engine Failure; Fire Fighting; Flares; Getting a tow; Helicopter rescue; Holed hull; Man overboard; Medical emergency; Mayday; Panpan; Securité.

INDEX The index is an A-Z of symbols and abbreviations and enables the user to quickly look up the symbols and see them in context with others in the same categories. 
This app is based on the United Kingdom Hydrographic Office's print publication "Chart 5011 (INT 1) EDITION 2" Admiralty Charts Publication and "Chart No.1 United States of America Nautical Chart Symbols, Abbreviations and Terms". 

We have an on-going program of marine navigation and boating safety apps, so please contact us with any ideas or features that you would like to see included. 

Safe boating!

## Key features

- Reference guide to INT 1 symbols
- Fully searchable index
- Tap & Enlarge feature
- Offline access
- Bonus emergency tips

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/electronic-nautical-chart-symbols-and-abbreviations/id712286784/reviews.md

### 5/5 — Great, can recommend

*2017-11-30*

Useful to carry with me and a helpful quick check of the symbols. Good reference.

### 4/5 — Handy reference guide, can recommend

*2014-04-23*

I'm studying for my navigation exam and found this very useful. It lists all sorts of symbols that you see on the chart with what they are, and is searchable.

## Frequently asked questions about ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS

### What is ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS?

It is a reference guide to symbols used on electronic nautical charts (ECDIS) as specified by the International Hydrographic Organization (IHO). It helps users understand chart layouts, topography, hydrography, and navigation aids.

### Does ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS require an internet connection?

No, this app does not require an internet connection. It is fully functional offline, making it convenient for use at sea.

### What kind of symbols does ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS cover?

It covers hundreds of symbols across five main sections: General, Topography, Hydrography, Navigation Aids & Services, and Index & Abbreviations, based on IHO's INT 1 specifications.

### Can I enlarge symbols in ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS?

Yes, the app features a 'Tap & Enlarge' function that allows you to view symbols in greater detail.

### What bonus content is included with ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS?

The app includes free bonus content from 'Safe Skipper,' offering tips on dealing with various maritime emergencies such as distress signals, engine failure, and man overboard situations.

### On which devices can I use ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS?

This app is supported on iPhone, iPad, and iPod devices.

### How often is ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS updated?

The app was last updated on August 30, 2017, to version 3.0. The developer has an ongoing program for marine navigation apps and welcomes user suggestions.

### What is the price of ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS?

The app is available for a one-time purchase price of $1.99.

## Version history (last 2 releases)

### 3.0 — 2017-08-30

This update from Apple will improve the functionality of this app. No new features are included.

Improved interface and more responsive for a better user experience.

### 1.0 — 2013-10-31

No release notes.

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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 2026-08-29.*