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?

Correct Answer: Option A — Red over amber (yellow)

On the Illinois Waterway, specific light signals are used to warn mariners of hazardous current conditions near dams. A red over amber (yellow) light signal indicates that wickets or bear traps are open or partially open, which may create dangerous cross-currents in the upper lock approach.