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According to Rule 5 — Look-out, which statement is correct?
A
The watch must make a full appraisal of the situation, not just detect targets.
B
The whistle, bell and gong shall comply with the specifications of Annex III.
C
A single prolonged blast warns of a blind bend or obstruction in a channel.
D
Anchor signals use the bell every minute, not the 2-minute whistle interval.