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According to Rule 33 — Equipment for Sound Signals, which statement is correct?
A
100m+: whistle, bell, AND gong required.
B
The watch must make a full appraisal of the situation, not just detect targets.
C
Every vessel shall at all times proceed at a safe speed so that proper and effective action can be taken to avoid collision.
D
Every vessel shall use all available means to determine if risk of collision exists. If in doubt, such risk shall be deemed to exist.