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According to Rule 5 — Look-out, which statement is correct?
A
The word "underway" means that a vessel is not at anchor, or made fast to the shore, or aground.
B
Rule 4 clarifies that the rules in Section I (Rules 4–10) apply in any condition of visibility, whether clear or restricted.
C
Rule 5 is one of the most important rules in the Convention.
D
A steady or nearly steady bearing is a classic collision-warning sign.