USS G-2 (SS-27) was a G-class submarine of the United States Navy. While the four G-boats were nominally all of a class, they differed enough in significant details that they are sometimes considered to be four unique boats, each in a class by herself. G-2 was named Tuna when her keel was laid down on 20 October 1909 by the Lake Torpedo Boat Company in Bridgeport, Connecticut, making her the first ship of the United States Navy to be named for the tuna, a large, vigorous, spiny-finned fish highly esteemed for sport and food. She was renamed G-2 on 17 November 1911, launched on 10 January 1912 sponsored by Ms. Marjorie F. Miller, towed to the New York Navy Yard after the termination of the Lake contract on 7 November 1913 where she was completed, and commissioned on 1 December 1913. Service history Departing New York City under tow of submarine tender Ozark (ex-Arkansas) the submersible torpedo boat arrived at the torpedo station, Newport, Rhode Island, on 28 February 1914. Attached to the Atlantic Submarine Flotilla, G-2 spent the next five months conducting dive training and engineering exercises with in Long Island Sound and Narragansett Bay. During these trials the boat made six submerged runs to a maximum depth of . Her engines proved troublesome, however, and after the port armature shaft failed on 31 March, the boat was towed to New York for repairs. While there, financial considerations led to G-2 being put in reserve commission on 15 June 1914. G-2 was placed in full commission at New York City on 6 February 1915. Attached to Division Three, Submarine Flotilla, Atlantic Fleet, the boat joined G-1, tender and tug , for a cruise to Norfolk, Virginia on 25 March. Arriving there two days later, the submersible conducted maneuvers in Hampton Roads before proceeding to Charleston, South Carolina in April, arriving there on 17 April. Following a short yard period for repairs, the division proceeded back to New York, mooring alongside the 135th Street pier on 9 May. On 18 May, G-2 joined other warships and passed in review before President of the United States Woodrow Wilson, who looked on from the yacht . The boat then sailed to Nantucket, Massachusetts, to participate in a war problem off Block Island, before unloading her torpedoes at Newport on 25 May. Ordered back to New York for an overhaul, the submersible again