She finally put to sea on 1 June 1917 and returned to New London that same day. Assigned to Division Two (Training and Experimental Division), Submarine Flotilla, Atlantic Fleet, G-3 combined the training of new student crews in submarine operations and torpedo firing with experimental work as needed. The latter included harbor net defense deployment drills with tender in June and stationary dives with a submarine rescue bell in the Thames River in September. In late October, G-3 carried out instructional sound work with , a task resumed in early 1918 in company with a succession of submarine chasers and patrol boats. On 26 April 1918 she ran aground on Eel Grass Shoal near Fishers Island, New York. Refloated and returned to service. In May 1918, G-3 participated in submarine division maneuvers in Great Salt Pond Bay, including several two to five-day cruises at sea. In early June, following warnings of German U-boats off the East Coast, G-3 conducted a number of periscope and listening patrols in the region. These operations came to a sudden end on 13 June, when engine and battery trouble forced the boat to sail to New York for spare parts. Returning to New London on 18 June, G-3 underwent an availability at the Thames Shipyard through mid-July. Resuming school duties on 17 July, G-3 spent the next three months conducting torpedo instruction, listening and radio training for officer and enlisted submarine students. Following an engineering performance cruise to Boston, Massachusetts, in September, the boat conducted training operations through October. On 10 November, G-3 began preparations for an overhaul at the Submarine Base, New London, which lasted through April 1920. Although she returned to her familiar training and instruction duties in May, the boat was tapped for inactivation on 6 December. G-3 was decommissioned at New London on 5 May 1921 and towed to the Philadelphia Navy Yard on 17 August. Having been stripped of machinery and fittings, the hulk was sold for scrap to Joseph G. Hitner on 19 April 1922 and struck from the Naval Vessel Register that same day. References External links United States G-class submarines World War I submarines of the United States Ships built in Bridgeport, Connecticut 1913 ships