The reference guide to rules and signals at sea. Part of a series of Marine Navigation apps, Rules & Signals is a useful tool for sailors, fishermen, surfers and people involved in sea water sports. The Imray Marine Navigation reference products are intended for quick reference and learning.

Beautifully illustrated with diagrams and short, clear text. Remind yourself quickly about a rule or light, or learn at home, traveling or in the winter while planning your trips.

- Steering and sailing rules.
- Lights and shapes: day and night time marking of boats.
- Sound signals in restricted visibility. Actual sounds.
- Distress signals.
- Full Colregs text.

- Buoys: worldwide buoyage systems A & B and animated harbour approaches.
- Buoy lights, animated.
- Sample harbour charts from around the world, with animated lights.
- Flags: flag translator, phonetic alphabet, morse code and message builder.
- Dual flag messages.
- Racing flags.
- Semaphore flags.
- Radio calls including Mayday/PanPan and radio channels.
- Life saving communication including air rescue: Solas V.
- Communication with air rescue.

- Learning cards for all content, by section or for all Rules together.

Content can be scrolled, viewed individually or in sequence. Large images (charts and at a glance images) can be zoomed and panned.

Based on the International Regulations for Preventing Collisions and Sea, 1972, with amendments in force from November 1995, SOLAS Chapter V Regulation 29 and the general guidelines for buoys and signals.

English, French, German, Italian, Spanish, Japanese

Imray are a leading chart and marine book publishers, based in England and with a catalogue of charts that covers 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
MARINE CHARTS - Europe Atlantic, Mediterranean, Caribbean, Australia
BOAT INSTRUMENTS & AIS (requires WiFI NMEA bridge)

What’s New

Version 3.1

COLREGS Rule 39-41

Ratings and Reviews

Enduro128 ,

Not worth it - Rules are not nearly as concise as they need to be

I am a naval navigator and noticed that there are many mistakes in this program. Unfortunately the rules are written by a bunch of lawyers so as the average sailor can't break the code easily. With this in mind it is very important to understand the rules VERY concisely which this program does an exceptionally poor job.

As an addendum to my previous comments above, please note things precisely whereby a vessel is not over 50m by virtue of the lights it shows, it actually mean that the vessel is "possibly over 50m" these kind of elementary mistakes on the rules are not excused until fixed - please fix them, or at least get a proper interpreter of the rules before release of your next version.

Mike in Vancouver. Canada ,

Great app.

Perfect for learning and reference.

masterbates ,

Worth every penny and more,

Awesome program,it's really the complete package. Great for reference and studying. Would recommend to the pros and user friendly for the novice.


Imray, Laurie, Norie & Wilson LTD
27.6 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.
English, French, German, Italian, Japanese, Spanish
Age Rating
Rated 4+
© Imray, Laurie, Norie & Wilson Ltd 2017


  • Family Sharing

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

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