About ColRegs: Nav Lights & Shapes
ColRegs: Nav Lights & Shapes helps sailors, powerboaters, anglers, skippers, crew and maritime professionals recognise vessels and understand what they are doing, as specified by the International Regulations for...
ColRegs: Nav Lights & Shapes helps sailors, powerboaters, anglers, skippers, crew and maritime professionals recognise vessels and understand what they are doing, as specified by the International Regulations for Preventing Collisions at Sea (IRPCS/ColRegs).
Learn to identify vessels, understand their activities and interpret navigation lights and day shapes with this essential ColRegs reference and revision app.
QUICK, PRACTICAL REFERENCE
Whether you are on the water or ashore, studying in daylight or identifying a vessel in darkness or poor visibility, the app helps you find the relevant illustration, rule and definition in seconds.
• Quick-reference and revision tool
• Search across ColRegs, navigation lights, day shapes and study content
• Improve your recognition of vessels at night and by day
• Supports sailing, boating and maritime training courses
• Learn using more than 100 custom-made illustrations
• Supports classroom instruction and independent study
• Test your recall through interactive quizzes
• Visual aide-mémoire when out on the water
• Use core reference content without internet connection
WHAT'S NEW IN THIS VERSION
This major update makes ColRegs: Nav Lights & Shapes clearer, faster and easier to use.
• Save Favourites
• Reorder Favourites
• Continue from last page viewed
• Detailed search results
• Expand full rule only when you need it
• New gallery-style viewer
• Access additional Safe Skipper online quizzes
• Share the app with friends
WHAT’S INCLUDED
1. NAVIGATION LIGHTS
Study detailed illustrations and descriptions of the lights displayed by different vessels at night or in restricted visibility.
Learn to recognise vessel types, their aspect and the activities in which they may be engaged.
2. DAY SHAPES
Explore clear illustrations and descriptions of the shapes displayed by vessels during daylight.
Use these visual references to identify vessel status and activity more confidently.
3. TEST YOURSELF
Check your knowledge using three quizzes featuring multiple combinations of navigation lights and day shapes.
Also access an extended selection of online Safe Skipper boating quizzes.
4. COLREGS
Consult Part C: Lights and Shapes, Rules 20–31 of the ColRegs, reproduced in full for detailed reference and revision.
DESIGNED FOR REFERENCE, LEARNING AND REVISION
A sound understanding of the ColRegs is essential for everyone who goes to sea in sailing or powered craft. Candidates preparing for Day Skipper, Boatmaster or Yachtmaster assessments can use the app to reinforce their knowledge and practise identifying vessels quickly.
ColRegs: Nav Lights & Shapes:
The app has been researched and produced with accuracy and practical learning in mind. Its clear visual approach makes complex combinations of lights and shapes easier to understand and remember.
ENDORSED BY THE SAILING AND BOATING COMMUNITY
“Very easy to use, wish I’d had this when I was doing Day Skipper!”
“We run a training centre and these apps are a great aide-mémoire for our students.”
“I have just downloaded and am using ColRegs Nav Lights & Shapes app, a brilliant training and reference device.”
“I really like the ColRegs part of it and the way you have kept it completely in line with the IRPCS.”
“Beautifully produced and very simple to use, a cool learning tool.”
“Good app for anyone to use, especially when you are training for Boatmaster, Yachtmaster etc. Much easier than flip cards.”
OTHER APPS IN THIS SERIES
• ColRegs: Rules of the Road covers the Steering and Sailing Rules and Sound and Light Signals sections of the IRPCS.
• IALA Buoys & Lights covers both IALA Maritime Buoyage Systems A and B.
Previous Versions
Here you can find the changelog of ColRegs: Nav Lights & Shapes since it was posted on our website on 2013-08-21 21:25:32.
The latest version is 11.0.0 and it was updated on 2026-10-12 21:16:27. See below the changes in each version.
ColRegs: Nav Lights & Shapes version 11.0.0
Updated At: 2026-08-01
Changes: Identify navigation lights and day shapes with confidence. Search ColRegs, save Favourites, continue studying and test your knowledge wherever you are.
ColRegs: Nav Lights & Shapes version 10.2
Updated At: 2019-04-15
Changes: Updated Hi-res graphics and bigger quiz section.
ColRegs: Nav Lights & Shapes version 9.0
Updated At: 2015-09-04
Changes: A great new look with updated graphics to look great on tablets as well as 'phones.
ColRegs: Nav Lights & Shapes version 2.0
Updated At: 2013-02-03
Changes: Several fixes and updates
