IALACOLREG
4

Application

Rules in Section I apply in any condition of visibility.

Rule 4 clarifies that the rules in Section I (Rules 4–10) apply in any condition of visibility, whether clear or restricted. This is distinct from Section II rules which only apply when vessels are in sight of one another, and Section III which applies in restricted visibility.

Key Takeaways

1

Section I rules apply in ALL visibility conditions

2

These are the fundamental steering and sailing rules

3

Must be followed regardless of weather or visibility

Common Mistakes

Thinking different steering rules apply in fog vs clear weather for Section I

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