USNS Mercy is the lead ship of her class and is in non-commissioned service with the U.S Navy. There are no offensive weapons onboard this hospital ship, but it carries defensive ones.

National Steel and Shipbuilding Company in San Diego, California, built it as a San Clemente-Class Oil Tanker called SS Worth in 1976. However, her name was changed in 1984 when she was made into a hospital ship and launched the next year.

USNS Mercy strives to offer medical and surgical operations to support Marine Corps Air and Ground Task Forces, the naval amphibious task forces, Army and Air Force units, and battle forces.

She can also give surgical services to government agencies in times of disaster and offer humanitarian relief and function during peacetime military operations.

The ship has 1000 patient beds and is homeported in San Diego. It has many departments, such as radiology, physical therapy and burn care, dental unit, optometry, angiography, blood bank, morgue, labs and 2 oxygen-producing plants.

According to Source of photos: internet