You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by __________.

Correct Answer: Option A — 3 white lights in a vertical line in the center of the span

In USCG General Navigation principles (Bowditch, Light Lists, and Coast Pilots), regarding 'You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by', the verified fact is: '3 white lights in a vertical line in the center of the span'.