USS H-1

USS H-1 (SS-28), the lead ship of her class of submarine of the United States Navy, was originally named Seawolf, making her the first ship of the U.S. Navy to be named for the seawolf.

Seawolf was laid down by the Union Iron Works of San Francisco, California. She was renamed on 17 November 1911, launched on 6 May 1913 sponsored by Miss Lesley Jean Makins, and commissioned at Mare Island Navy Yard on 1 December 1913.

Service history
The new submarine was attached to Torpedo Flotilla 2, Pacific Fleet, and operated along the West Coast out of San Pedro, California. During various exercises and patrols, she traveled the coast from Los Angeles, California to lower British Columbia, often in company with her sister ships USS H-2 (SS-29) and sometimes USS H-3 (SS-30).

Sailing from San Pedro, California on 17 October 1917, she reached New London, Connecticut on 8 November. For the remainder of World War I, she was based there and patrolled Long Island Sound, frequently with officer students from the submarine school on board.

H-1 and H-2 sailed for San Pedro, California on 6 January 1920, transiting the Panama Canal on 20 February. On 12 March, as H-1 made her way up the coast of Mexico's Baja California Peninsula, she ran aground on a shoal off Magdalena Bay.

Four men – including the commanding officer died trying to reach shore. The diesel freighter MS Mazatlan on her maiden voyage for the California & Mexico Steamship Company (also this line's inaugural voyage), tried to pull the submarine into deep water, and then carried 22 survivors to San Pedro where they arrived on March 18. USS Vestal (AR-4) pulled H-1 off the rocks in the morning of 24 March, but in only 45 minutes, the submarine sank in some 50 ft of water. Further salvage effort was abandoned. Her name was stricken from the Naval Vessel Register on 12 April, and she was sold for scrap in June 1920, but never recovered.

In 2019, her wreck was identified south of Baja California.