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Under Rule 23 — Power-driven Vessels Underway, what should a navigator remember?
A
In restricted visibility, power-driven vessels making way sound one prolonged blast every 2 minutes.
B
The last vessel of a tow, if manned, shall where practicable sound one prolonged followed by three short blasts.
C
Annex IV recognizes both traditional visual signals and modern radio distress alerts.
D
≥12m PDVs show masthead light + sidelights + sternlight; smaller vessels have simplified options under.