BOTH INTERNATIONAL & INLAND A vessel which displays the day signal shown in illustration D006RR below may be engaged in which task?

Correct Answer: Option B — submarine cable laying

Rule 27(b) requires a vessel restricted in her ability to maneuver to display a ball, diamond, and ball in a vertical line. This signal is used by vessels engaged in operations like submarine cable laying, which significantly limit the vessel's ability to deviate from her course to avoid collision.