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Which option best reflects Rule 23 — Power-driven Vessels Underway?
A
Vessels 50m+ must show two masthead lights.
B
The vessel being overtaken answers with one prolonged, one short, one prolonged and one short if she agrees.
C
A power driven vessel making way through the water sounds one prolonged blast at intervals of not more than 2 minutes.
D
When in distress and requiring assistance, vessels shall use the signals described in Annex IV