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USNS Mercy
USNS Mercy (T-AH-19) is the lead ship of her class of hospital ships in non-commissioned service with the United States Navy. Her sister ship is USNS Comfort (T-AH-20). She is the third US Navy ship to be named after the virtue mercy. In accordance with the Geneva Conventions, Mercy and her crew do not carry any offensive weapons, though defensive weapons are available.
United States Naval Ship (USNS) Mercy was built as a San Clemente-class oil tanker, SS Worth, by National Steel and Shipbuilding Company, San Diego, California, in 1976. Starting in July 1984, she was renamed and converted to a hospital ship by the same company. Launched on 20 July 1985, Mercy was placed in service on 8 November 1986. She has a raised forecastle, a transom stern, a bulbous bow, an extended deckhouse with a forward bridge, and a helicopter-landing deck with a flight-control facility.
The conversions from oil tankers cost $208 million per ship and took 35 months to complete. The Mercy-class hospital ships are the third largest ships in the US Navy Fleet by length, surpassed only by the nuclear-powered Nimitz- and Gerald R. Ford-class supercarriers.
Her primary mission is to provide medical and surgical services to support Marine Corps Air/Ground Task Forces deployed ashore, Army and Air Force units deployed ashore, and naval amphibious task forces and battle forces afloat. Secondarily, she provides mobile surgical hospital service for use by appropriate US Government agencies in disaster and humanitarian relief, and limited humanitarian care incident to these missions and to peacetime military operations.
Mercy, homeported in San Diego, is normally in reduced operating status. Her crew remains a part of the staff of Naval Medical Center San Diego until ordered to sea, at which time they have five days to fully activate the ship to a NATO Role III Medical Treatment Facility, with the only higher level being filled by onshore fixed facilities outside the theater of operations. As of February 2026[update], the ship was underway from Alabama Shipyard through the Panama Canal scheduled for a 6-month $89 million drydocking maintenance in Portland, Oregon. It arrived in Portland in mid-March 2026.
Like most USNS ships, mariners from the US Navy's Military Sealift Command are responsible for navigation, propulsion, and most deck duties on board. Mercy is as of 2012 part of MSC's Service Support Program. The "Medical Treatment Facility", or hospital on the ship, is commanded by a captain of the Navy Medical Corps or Navy Nurse Corps.
On 27 February 1987, Mercy began training while en route on a humanitarian cruise to the Philippines and the South Pacific. The staff included U.S. Navy, Indian Navy, U.S. Army, and U.S. Air Force active duty and reserve personnel; United States Public Health Service; medical providers from the Armed Forces of the Philippines; and MSC civilian mariners. Over 62,000 outpatients and almost 1,000 inpatients were treated at seven Philippine and South Pacific ports. Mercy returned to Oakland, California, on 13 July 1987.
On 9 August 1990, Mercy was activated in support of Operation Desert Shield. Departing on 15 August, she arrived in the Persian Gulf on 15 September. For the next six months, Mercy provided support to multinational allied forces. She admitted 690 patients and performed almost 300 surgeries. After treating the 21 American and two Italian repatriated prisoners of war, she departed for home on 16 March 1991, arriving in Oakland on 23 April.
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USNS Mercy
USNS Mercy (T-AH-19) is the lead ship of her class of hospital ships in non-commissioned service with the United States Navy. Her sister ship is USNS Comfort (T-AH-20). She is the third US Navy ship to be named after the virtue mercy. In accordance with the Geneva Conventions, Mercy and her crew do not carry any offensive weapons, though defensive weapons are available.
United States Naval Ship (USNS) Mercy was built as a San Clemente-class oil tanker, SS Worth, by National Steel and Shipbuilding Company, San Diego, California, in 1976. Starting in July 1984, she was renamed and converted to a hospital ship by the same company. Launched on 20 July 1985, Mercy was placed in service on 8 November 1986. She has a raised forecastle, a transom stern, a bulbous bow, an extended deckhouse with a forward bridge, and a helicopter-landing deck with a flight-control facility.
The conversions from oil tankers cost $208 million per ship and took 35 months to complete. The Mercy-class hospital ships are the third largest ships in the US Navy Fleet by length, surpassed only by the nuclear-powered Nimitz- and Gerald R. Ford-class supercarriers.
Her primary mission is to provide medical and surgical services to support Marine Corps Air/Ground Task Forces deployed ashore, Army and Air Force units deployed ashore, and naval amphibious task forces and battle forces afloat. Secondarily, she provides mobile surgical hospital service for use by appropriate US Government agencies in disaster and humanitarian relief, and limited humanitarian care incident to these missions and to peacetime military operations.
Mercy, homeported in San Diego, is normally in reduced operating status. Her crew remains a part of the staff of Naval Medical Center San Diego until ordered to sea, at which time they have five days to fully activate the ship to a NATO Role III Medical Treatment Facility, with the only higher level being filled by onshore fixed facilities outside the theater of operations. As of February 2026[update], the ship was underway from Alabama Shipyard through the Panama Canal scheduled for a 6-month $89 million drydocking maintenance in Portland, Oregon. It arrived in Portland in mid-March 2026.
Like most USNS ships, mariners from the US Navy's Military Sealift Command are responsible for navigation, propulsion, and most deck duties on board. Mercy is as of 2012 part of MSC's Service Support Program. The "Medical Treatment Facility", or hospital on the ship, is commanded by a captain of the Navy Medical Corps or Navy Nurse Corps.
On 27 February 1987, Mercy began training while en route on a humanitarian cruise to the Philippines and the South Pacific. The staff included U.S. Navy, Indian Navy, U.S. Army, and U.S. Air Force active duty and reserve personnel; United States Public Health Service; medical providers from the Armed Forces of the Philippines; and MSC civilian mariners. Over 62,000 outpatients and almost 1,000 inpatients were treated at seven Philippine and South Pacific ports. Mercy returned to Oakland, California, on 13 July 1987.
On 9 August 1990, Mercy was activated in support of Operation Desert Shield. Departing on 15 August, she arrived in the Persian Gulf on 15 September. For the next six months, Mercy provided support to multinational allied forces. She admitted 690 patients and performed almost 300 surgeries. After treating the 21 American and two Italian repatriated prisoners of war, she departed for home on 16 March 1991, arriving in Oakland on 23 April.