Coco Solo Naval Air Station Canal Zone, 1936.  Harbor basin being used as a recreation/ training area.  This is a great photo in full size to enlarge and study.  The closest float and swim area is for officers only where I am sure the opposite side is for everyone else.  In the distance, to the right on the water's edge are some of the Naval Sea Planes used.  The large building next to the planes must be a hanger area..  What a classic photo!