Learn Colregs lights and shapes (COLREGS partC) by testing yourself. All the light arrangements and shapes from the COLREGS are included. Questions are presented from any point of view including many combinations.

The answer comes with the text and number of the applicable rule in COLREGS. For questions regarding lights a view in perspective showing the area visibility of each light.

To reduce app's size, all configurations are generated from a light 3D model.

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