Question 381Navigation General70% to pass
You are approaching a swing bridge at night. You will know that the bridge is open for river traffic when _______________.
AI Explanation
The correct answer is B) the red light changes to green.
The reasoning is that when a swing bridge is open for river traffic, the navigational lights on the bridge will show a steady red light when the bridge is closed to river traffic. When the bridge is open, the red light will change to a steady green light, indicating that the channel is clear and safe for vessels to pass through.
The other options are incorrect because: A) a flashing green light indicates the bridge is closed, not open; C) the red light should not be extinguished when the bridge is open; and D) the amber light is not used for this purpose, the red light is what changes to green.
Related Questions
#379 Aids to navigation marking the intra-coastal waterway can be identified by _______________.#380 The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35 feet. Which of these tows will require a double lockage? #382 Illustration D036NG below represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter D? #383 Illustration D037NG below represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash? #384 What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?