From: Dictionary of American Naval Fighting Ships, Vol. III, p. 2.

G-4

(SS-26: dp. 360(n); l. 157'6"; b. 17'6"; dr. 10'11"; s. 14 k.; cpl. 24; 
a. 4 18" tt.; cl. G-4)

G-4 was laid down as THRASHER 9 July 1910 by William Cramp & Sons, 
Philadelphia, Pa. renamed G-4 on 17 November 1911; launched 15 August 
1912; sponsored by Miss Grace Anna Taussig; and commissioned in the 
Philadelphia Navy Yard 22 January 1914, Lt. L. D. McWhorter in command. 

G-4 arrived New York Navy Yard from Philadelphia 25 April 1914 for 
service with Division 3 of the Atlantic Submarine Flotilla in Long 
Island Sound and intermittently at Newport, R.I., and New London, Conn. 
Arriving New London 24 April 1917, she served as schoolship for students 
of the submarine school while taking part in pioneering work to advance 
the capabilities of submarine and antisubmarine warfare. 

G-4 assisted in experiments and tests with underwater sound apparatus in 
the Thames River, Long Island Sound, and Narragansett Bay. During the 
last year of World War I she test-fired the Mark VII torpedo in 
Narragansett Bay for N-class and 0-class submarines.

G-4 continued her training and experimental duties until 1 March 1919 
when she was placed in ordinary for stripping and inactivation. She 
decommissioned 5 September 1919; was designated as a target for depth 
charge and ordnance tests 6 December, and was sold for scrapping 15 
April 1920 to Connecticut Iron & Metal Co., New London.