USS H-6 (SS-149)

USS H-6 (SS-149) was an H-class submarine that served in the United States Navy from 1918-1931.

The Imperial Russian Navy ordered 18 H-class submarines from the Electric Boat Company in 1915. Eleven were delivered, and served as the American Holland class submarines, but shipment of the final six was held up pending the outcome of the Russian Revolution of 1917, and the boats were stored in knockdown condition at Vancouver, British Columbia. All six were purchased by the U.S. Navy on 20 May 1918 and assembled at Puget Sound Navy Yard.

H-6 was launched on 26 August 1918, and commissioned on 9 September with Lieutenant Robert P. Lucker in command.

As part of Submarine Division 6 (SubDiv 6) and later SubDiv 7, H-6 was based at San Pedro, California. From there, she operated along the West Coast, participating in various battle and training exercises with her sister submarines. Occasional patrol duty off Santa Catalina Island and overhauls at Mare Island varied this training routine.

Departing San Pedro on 25 July 1922 with SubDivs 6 and 7, H-6 reached Norfolk, Virginia on 14 September. She decommissioned there on 23 October. H-6 was struck from the Naval Vessel Register on 26 February 1931. She was sold for scrapping on 28 November 1933.