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Under Rule 22 — Visibility of Lights, what should a navigator remember?
A
Rule 19 applies when vessels are not visually in sight of one another.
B
<12m vessels: masthead 2 nm, sidelights 1 nm, sternlight/all-round 2 nm.
C
A vessel detecting another by radar alone shall determine whether a close quarters situation or risk of collision is developing.
D
Day shapes matter in daylight even when the ship's lights are also relevant.