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Which answer is consistent with Rule 37 — Distress Signals?
A
Red flares and orange smoke are classic visual distress signals.
B
A vessel aground shall exhibit the anchor lights and shape plus two all round red lights and three balls in a vertical line.
C
"Whistle" is a generic term for any Annex III-compliant horn, siren or foghorn.
D
The term "prolonged blast" means a blast of from four to six seconds' duration.