This pair of range lights/markers help guide ships in the channel. When the two markers appear exactly on top of each other, the approaching ship is correctly lined up for approach.
The rear marker stands 76 feet tall, and is the rear of a pair of markers aligned to 69 degrees. The front marker is on the water's edge about 730 feet southwest of the rear marker, and stands 26 feet tall
The rear light flashes 6 seconds on 6 seconds off (isophase).