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 3.2

- iOS13 compatibility including dark mode.

Ratings and Reviews

4.0 out of 5
4 Ratings

4 Ratings

Amanita design ,


Please update !

Daisymay ,

What a mind numbing subject

"Rule of the Road", at sea... OMG... This is an excelent app for those out there who make their living on the water ways. It's not the easiest subject to study, but this app helps.

Not sure what old mate "Fishy79" is on about with his statement that it could go into "more depth", the content is verbatim, straight from the official publication. It would be nice to have some sort of self test.

UPDATE: 22 Oct 09 looks like the crew that developed this app have now added a self test section to the app now. Top marks for that can't ask for much more than that, wish I had something as user friendly when I needed to study the "Rule of the Road" 6 Stars...

nickTSyd ,

Like it. Could you add a zoom function.

Very well thought out app.

I think a zoom (pinch) function would be very useful when viewing some of the map graphics - for the 40+ the writing is getting pretty small. Thanks.


Imray, Laurie, Norie & Wilson LTD
29 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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