Part B · Steering and sailing rules · Rule 4
Application
4 Rules in this Section apply in any condition of visibility.
- “Rules in this Section”Section I of Part B, which is Rules 4 to 10: look-out, safe speed, risk of collision, action to avoid collision, narrow channels and traffic separation schemes.
- “apply in any condition of visibility”They apply all the time: in clear weather or fog, by day or by night, and whether or not other vessels are in sight.
Rules 4 to 10 always apply. Section II (Rules 11 to 18) applies only to vessels in sight of one another, and Section III (Rule 19) only to vessels not in sight of one another in or near restricted visibility.