After the modern sea-level canal opened in 1927, pilot boats operated by the Army Corps of Engineers worked at each end of the waterway, one assigned to Reedy Point on the Delaware River and the other stationed at Town Point on the Elk River in Maryland. These patrol boats met incoming ships, checked traffic, did patrols, and sometimes made rescues. But modernization had arrived on Canal as closed circuit televisions, radar, and advanced in radio communications made the work of meeting income boats and other tasks obsolete. On Nov. 19, 1968, the work of the patrol boats was retired, and modern, centralized technology took over the tasks.