Question 10 GLI08 - Limited OUPV

The Correct Answer is C 1. **Why option C ("a vessel engaged in diving operations") is correct:** Rule 27(e) of both the International Regulations for Preventing Collisions at Sea (COLREGs) and the corresponding Inland Rules specifies the day signal for a vessel engaged in diving operations. A vessel constrained by its draft or restricted in its ability to maneuver while engaged in diving operations is required to display, besides the lights or shapes prescribed in Rule 27(b), three signals: a vertical arrangement of balls/diamonds/lights, **and** a rigid replica of the International Code flag "A" (Alpha flag). The Alpha flag signifies "I have a diver down; keep well clear at slow speed." 2. **Why the other options are incorrect:** * **A) a vessel engaged in underway replenishment:** A vessel engaged in underway replenishment (a task listed under Rule 3(g) as restricting its ability to maneuver) displays the prescribed shapes/lights of a vessel restricted in its ability to maneuver (Rule 27(b)). It does not specifically require the display of the rigid replica of the "A" flag. * **B) a vessel pulling a submarine cable:** A vessel engaged in cable laying operations (which restricts its ability to maneuver) displays the prescribed shapes/lights of a vessel restricted in its ability to maneuver (Rule 27(b)). It does not require the display of the rigid replica of the "A" flag. * **D) a vessel transferring explosives:** There are no specific day signals defined in COLREGs or the Inland Rules requiring a rigid replica of the "A" flag solely for a vessel transferring explosives. Vessels transferring dangerous cargo (if restricted in their ability to maneuver) would display the signals for a vessel restricted in its ability to maneuver (Rule 27(b)), but not the diver down signal.