All vessels
Rule Reference
Rule 23(b): an air-cushion vessel when operating in the non-displacement mode shall, in addition to the lights prescribed in paragraph (a), exhibit an all-round flashing yellow light.
Top-Down View
Tap any light dot to see its COLREGS sector and rule.
In the Navitime app
This is just a fraction of what the app offers
Download Navitime free on iOS and Android for the full Advanced Navigation book collection, adaptive quizzes, flashcards, and mock exams — all fully offline.