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According to Rule 31 — Seaplanes, which statement is correct?
A
Vessels 50m+ must show two masthead lights.
B
Seaplanes must exhibit lights as similar as practicable to the rules.
C
Rule 23 specifies lights for power driven vessels underway.
D
A power driven vessel when towing shall exhibit: Two masthead lights in a vertical line instead of the single forward masthead light.