NavitimeNavitime
All topics

At Anchor Day Shape

Rule 30(a): One black ball forward. Night: white all-round light forward.

At Anchor

One black ball forward

Night: white all-round light forward

Rule 30(a)

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.