Complete reference for symbols, abbreviations and terms used in marine charts. Useful as an aid for teaching and learning, or as reminder for experienced sailors and sea cartography users.

- Comprehensive coverage: more than 800 symbols and abbreviations.
- Full content tree, organised for ease of use.
- Index and grouped index for all entries.
- Search facility.
- Sample chart with visual popups for commonly used symbols.
- Favourites: archive your best symbols.
- Multi-language within the app (English/French).

Full international standard from the IHO.All topics from the IHO, UKHO, SHOM, NOAA, CHS and other hydrographic offices:
position, distance, direction, compass, features, landmarks, ports, tides, currents, seabed, rocks, wrecks, obstructions, offshore, tracks, routes, areas, limits, lights, buoys, beacons, fog, radar, radio, services, small craft.

English, French, German, Italian, Spanish

Imray are a leading chart and marine book publishers, based in England and with a catalogue of charts for Europe, the Mediterranean and the Caribbean. Imray's pilot books cover the whole world in extensive detail.

In partnership with Imray, software developers and sailors.

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Look out for other applications in the Marine Navigation Series from Imray:

TIDES PLANNER - tide predictions any date
RULES & SIGNALS- Rule of the Road, signals at sea.
RACING RULES - RYA Handy Guide to rules for sailing races

What’s New

Version 2.1.0

• iOS13 compatibility including dark mode.

Ratings and Reviews

3.0 out of 5
2 Ratings

2 Ratings

nigelmercier ,

Great idea, but ...

... this app could be easier to use; the images are too small.

May I suggest that selecting a category opens it up full screen, allowing the images to be larger. Alternatively, touching an item in a category could bring up the magnified image as a popup on the same screen.

Will de Beest ,


A really well thought out app which does exactly what it says on the tin. A very useful reference tool for any aspiring mariner / yacht enthusiast. Highly recommended.

Havencourt ,

Not supported

Forget this it is not IOS 11 compatible and will soon not work

Developer Response ,

Hello, we are working on an upgrade for iOS11 compatibility and it will be released soon. Regards, Imray Support team


Imray, Laurie, Norie & Wilson LTD
37.8 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.


English, French, German, Italian, Japanese, Spanish

Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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