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Which answer is consistent with Rule 23 — Power-driven Vessels Underway?
A
WIG craft taking off/landing/in low flight: additional high-intensity flashing red.
B
A proper look out is not just "someone on the bridge".
C
A steady or nearly steady bearing is a classic collision-warning sign.
D
Risk of collision is often indicated when the compass bearing of an approaching vessel does not appreciably change.