This application allows you to learn COLREGs (International Regulations for Preventing Collisions at Sea) navigation lights rules. The app is structured in a card format according to COLREG rules. The results statistics is saved by the program and can be reset to default when needed.
Understanding of COLREG navigation lights allows you to correctly estimate the position of the vessel, its maneuvering capabilities and to determine the nature of its work at night time and in poor visibility conditions.
The application will be useful to navigators and those who prepare to become one.
We welcome any comments and suggestions to our e-mail:

What’s New

Version 1.5

We added a complex test that includes questions on COLREG. Test cards shuffle after statistics reset or before retaking the test.

Ratings and Reviews

4.9 out of 5
14 Ratings

14 Ratings

App Privacy

The developer, Smirnov Yury, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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