Question 3429 Deck General

The correct answer is D) On each corner of the rig. The location of obstruction lights on a mobile offshore drilling unit is governed by the Code of Federal Regulations (CFR) Title 33, Part 67, which outlines the requirements for aids to navigation on the Outer Continental Shelf. Specifically, Section 67.35-10 states that obstruction lights must be placed on each corner of the unit, ensuring that the structure is clearly visible to other vessels in the area. The other answer choices are incorrect because: A) Placing the lights only at the bow would not provide adequate visibility around the entire structure; B) Placing them only at the bow and stern would also be insufficient; and C) The drill mast is not the appropriate location for the obstruction lights, which need to be placed on the corners of the overall rig structure.