Question 3369 Deck General

70% to pass

What lighting characteristic is required of an obstruction light on a mobile offshore drilling unit on the waters of the U.S. Outer Continental Shelf?

A Quick-flashing
B Flashing
C Fixed
D Occulting
AI Explanation

The correct answer is A) Quick-flashing. According to the U.S. Coast Guard regulations, obstruction lights on mobile offshore drilling units on the Outer Continental Shelf waters must have a quick-flashing characteristic. This is specified in the Code of Federal Regulations (CFR) Title 33, Part 67, which governs the aids to navigation on artificial islands and fixed structures on the Outer Continental Shelf. The other options are incorrect because flashing, fixed, and occulting lights do not meet the regulatory requirement for quick-flashing obstruction lights on these types of offshore units.

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