A jack-up drilling unit elevated on the Outer Continental Shelf must have a fog horn that will sound __________.
Official USCG Answer & Rule Citation
Correct Answer: Option A — a 2-second blast every 20 seconds
Aids to Navigation and Coast Guard regulations require fixed offshore structures and jack-up drilling units on the Outer Continental Shelf to sound a rapid fog signal of a 2-second blast every 20 seconds during periods of restricted visibility.
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