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According to Rule 5 — Look-out, which statement is correct?
A
"In sight of one another" requires VISUAL observation — radar contact alone does not count.
B
Vessels shall be deemed to be "in sight of one another" only when one can be observed visually from the other.
C
Safe speed is whatever allows timely, effective collision-avoidance action in the actual conditions.
D
Every vessel shall at all times maintain a proper look-out by sight and hearing as well as by all available means.