Question 3436 Deck General

The correct answer is B) vessel. According to the International Regulations for Preventing Collisions at Sea (COLREGS), a jack-up drilling rig under tow is considered a "vessel" for the purposes of the rules. This is because the COLREGS define a vessel as "every description of water craft, including non-displacement craft and seaplanes, used or capable of being used as a means of transportation on water." A jack-up drilling rig, even when under tow, falls under this definition as it is a waterborne structure capable of being moved on water. The other answer choices are incorrect because A) a jack-up rig is not a power-driven vessel, C) it is not a non-displacement vessel, and D) it is not a limited vessel as defined in the COLREGS.