Pina Range, Atlantic Side... June 1968 Photos... Headquartered at FT CLAYTON, the 517th Artillery filled the air defense requirement for the Canal until 1970. The battalion had two AW (gun) batteries, and two HAWK (missile) batteries, with one of each on each end of the canal. Charlie Battery was stationed at Ft Amador, at the end of the causeway. Delta Battery was at Fort Sherman. Fort Clayton had the main motor pool, Headquarters Company, and Bravo Battery, which could reach the N. American side of the canal by crossing the Thatcher Ferry Bridge. Alpha Battery was at Fort Davis, but was split into two firing sections, one on each side of the Canal.