Coco Solo
On 15 July 1919, "Breakwater" was assigned to Submarine Division 1 at Coco Solo in the Panama Canal Zone. That day, she received orders to assemble at Cape May, New Jersey, with the patrol vessels and at "the earliest practicable date and when ready proceed in company by Canal Zone to assigned stations." "Breakwater" reached her station in the Canal Zone and operated out of Coco Solo as a utility vessel with Submarine Division 1.