USS R-19 (SS-96) was an R-class coastal and harbor defense submarine of the United States Navy.
USS G-1 (SS-19½) was the lead ship of her class of 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.
USS Mingo (SS-261) — a Gato-class submarine — was the first ship of the United States Navy to be named for the mingo snapper.
USS R-5 (SS-82) was an R-class coastal and harbor defense submarine of the United States Navy.
USS R-23 (SS-99) was an R-class coastal and harbor defense submarine built for the United States Navy during World War I.
USS K-6 (SS-37) was a K-class submarine of the United States Navy. Her keel was laid down by the Fore River Shipbuilding Company in Quincy, Massachusetts, under a subcontract from the Electric Boat Company of Groton, Connecticut. She was launched on 26 March 1914, sponsored by Mrs. Thomas Gaines Roberts, and commissioned on 9 September at Boston, Massachusetts, with Lieutenant J. O. Fisher in command.
USS D-2 (SS-18) was a D-class submarine of the United States Navy. Her keel was laid down by Fore River Shipbuilding Company in Quincy, Massachusetts, under a subcontract from Electric Boat Company of Groton, Connecticut, as Grayling, making her the first ship of the U.S. Navy to be named for the Arctic grayling, a fresh-water game fish closely related to the trout. Grayling was launched on 16 June 1909, sponsored by Miss C. H. Bowles, and commissioned on 23 November 1909 with Lieutenant Owen Hill in command. She was renamed D-2 on 17 November 1911.
USS Fulton (AS-1) was constructed as a submarine tender in 1914, but later was converted into a gunboat and redesignated PG-49.
USS Magistrate (SP-143) was a Magistrate-class patrol boat acquired by the U.S. Navy for the task of patrolling the coasts and harbors of the United States.
USS Daraga (SP-43) was a United States Navy patrol boat in commission from 1917 to 1919.
USS Felicia (SP-642) was a yacht acquired by the United States Navy during World War I. She was outfitted and armed by the Navy as a patrol craft, and was assigned to patrol the New England waters. Her task of protecting ships from German submarines was interrupted by her collision with a submarine. Post-war she was reconfigured to her civilian condition, and was sold in 1919.
USS Inca (SP-1212) was a 62-foot-long motorboat leased by the U.S. Navy during World War I. She was outfitted as a patrol craft, but was additionally assigned other duties, such as rescue craft, seaplane tender, and dispatch boat. She served in the Boston, Massachusetts, and Hampton Roads, Virginia, waterways until war’s end when she was returned to her owner.
USS Anderton (SP-530), originally to have been USS Raymond J. Anderton (SP-530), was a patrol vessel and minesweeper that served in the United States Navy from 1917 to 1919.
USS Gem (SP-41) was an armed yacht that served in the United States Navy as a patrol vessel from 1917 to 1919.
USS Navajo III (SP-298), later USS SP-298, was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1919.
The first USS Ardent (SP-680) was a United States Navy patrol vessel and minesweeper in commission from 1917 to 1921. Acquired upon the entry of the United States into World War I, the ship served in New England during the war, and was sold back into private ownership in 1921.
The first USS Vision (SP-744), later USS SP-744, was a United States Navy patrol vessel in commission from 1917 to 1919.
USS Jolly Roger (SP-1031) was a United States Navy patrol vessel in commission from December 1917 or early 1918 until November 1918.
The first USS Cero (SP-1189) was a United States Navy patrol vessel in commission from 1917 to 1918.
USS Herreshoff No. 306 (SP-1841), also written Herreshoff #306, was a United States Navy patrol vessel in commission from 1918 to 1922.
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