Vessel Lights

Vessel Lights

Maarten Pennings

Available on Google Play
4.4(2,082)
100,000+ installsFreeEducation

Updated Aug 2, 2026 · vv15rc1

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In three stages learn to identify vessels by their lights (from all angles).

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).

Released
January 20, 2013

13 years on Google Play

Version
v15rc1
Updated
Aug 2, 2026
Content Rating
Everyone
Installs
100,000+
Developer
Maarten Pennings
Website
N/A
Email
maartenpennings@gmail.com
In-app purchases
No

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Rating breakdown

5
1,382
4
345
3
138
2
207
1
0