Question 388Navigation General

The correct answer is B) an occulting white light. The centerline of a navigable channel under a bridge is typically marked with an occulting white light. This is in accordance with the U.S. Aids to Navigation System, which specifies that the centerline of a navigable channel shall be marked by an occulting white light. The other options are incorrect because: A) a flashing blue light is used to mark the location of a bridge pier or obstruction, not the centerline; C) three fixed white lights are not the standard marking for a channel centerline; and D) a yellow light is not used for this purpose in the lateral marking system.