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Which answer is consistent with Rule 32 — Definitions (Sound Signals)?
A
The whistle, bell and gong shall comply with the specifications of Annex III.
B
A single prolonged blast warns of a blind bend or obstruction in a channel.
C
Anchor signals use the bell every minute, not the 2-minute whistle interval.
D
The term "short blast" means a blast of about one second's duration.