Question 386Navigation General

The correct answer is C) there is a range of green lights under the lift span. This is the correct answer because the United States Coast Guard regulations specify that a vertical lift bridge is fully open when a range of green lights are displayed under the lift span, indicating it is safe for vessels to pass through. The other answer choices do not accurately reflect the standard visual indications for a fully open vertical lift bridge. The other answer options are incorrect because: A) a yellow light on the bridge pier indicates the bridge is opening or closing, not fully open; B) three white lights in a vertical line are not the standard indication for a fully open vertical lift bridge; and D) a flashing red light would indicate the bridge is closed or closing, not fully open.