 The SM-1 reactor, also known as the Army Package Reactor Program, was used to train nuclear operations personnel for all three services.For that reason, the MH-1A was installed and tested aboard the "Sturgis" while it was moored in Gunston Cove, near the SM-1 facility.Dredging a channel between the main course of the Potomac River and the shoreline of Gunston Cove began on 30 November 1964.