Vessel Lights

4.4
1.98K reviews
100K+
Downloads
Content rating
Everyone
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About this app

This app helps you to learn the vessel lights as prescribed by the International Regulations for Preventing Collisions at Sea (ColReg).

Learning in this app takes three stages. In the first stage "Study", the vessels can be browsed, and each vessel shows its lights from the side as well as from the top. A unique feature is that the vessel can be rotated by swiping, so that it can be viewed from all angles. In the second stage "Practice", random vessels are presented from a random angle, and in side view. Make a choice out of four answers. It is possible to cheat in various way: asking for the correct answer, rotating the vessel, going back to other vessels. The final stage is the "Examination". There is no cheating here. Random vessels from a random angle. Case after case. The timer is running. When the examination is finished, you are rewarded with a report. And, another unique feature, you can review your answers.

The app has some customization features such as choosing the amount of questions in the examination, whether to beep on correct/wrong answers, and the language.

Of course you can share your examination results with your friends.

This app requires no permissions.

If you want to make a translation for your language, please contact the developer (see e-mail address down below).
Updated on
Dec 21, 2020

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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4.4
1.98K reviews
A Google user
July 3, 2019
Great app! The ability to turn the light 360 degrees in the practice area is brilliant. I just wish the wrong answers would show longer in exam mode so I can learn from my mistakes. This can be changed in the settings but then correct answers show way too long. Great learning tool! EDIT: Thank you Maarten, no I didn't realise you could click your results to review the answers! That's brilliant, thanks!
22 people found this review helpful
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Maarten Pennings
June 29, 2019
Hi Maya, thanks for your comment. Do you know that you can review your answers after the exam? Just click the 'evaluate' button in the action bar (or tap your report card).
Stuart Laverick
June 23, 2022
Fantastic app. Simple but so effective, the ability to move the example lights around in 3d is great and the practice really tests you. Please add bouyage, flags and rules of the road, I'd happily pay to help development.
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A Google user
August 17, 2019
Great app, double diagrams help orient the learner quickly. One suggestion: It would be great to enter lights as seen by the observer to a screen and let the app tell you the heading and the type of vessel, or alternatively one could take a picture and let the app determine heading and type of vessel.
11 people found this review helpful
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What's new

Added Support for the Portugese language (v13rc3/rev53 - 2020 12 21)