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Which answer is consistent with Rule 32 — Definitions (Sound Signals)?
A
Short blast = about 1 second; prolonged blast = 4 to 6 seconds.
B
A vessel constrained by draught may display three all-round red lights in a vertical line, or a cylinder day shape.
C
Normal navigation lights (sidelights, sternlight) when underway.
D
The anchor day shape is one black ball.
