Since 1946, the United States' government has maintained fleets of various "mothballed" ships, which can be readied and used in case of a crisis.
These boats, some of which are very old, include military ships that served in World War II, the Korean War, the Vietnam War, and Desert Storm, as well as civilian merchant ships from previous decades. The fleets sit, mostly untouched and off-limits, in the coastal waters of California, Texas, and Mississippi, as well as North Carolina and New Jersey.
One of the fleets, located off the coast of San Francisco in Suisun Bay, once counted as many as 340 ships in its ranks. Today, 10 ships remain, rusting in the California sun, leaving toxic chemicals in the water. Because of this, the Maritime Administration has mandated their scrapping. By 2017, they will all be gone.
Boarding these ships is strictly prohibited to the general public — getting onto one at all is a tall task. However, photographer Amy Heiden gained access to the decaying ships before some of them were scrapped, shooting on their decks as well as inside the vessels.
The "Mothball Fleet" is about a mile off the coast of Suisan Bay, a body of water Northwest of San Francisco, near the town of Benicia.
Many of the ships were former military vessels. The USS Nereus, a submarine tender, joined the fleet in 1971 and didn't move until 2012, when it was sent to Texas to be scrapped.
The ships pose an environmental threat, as they have already dropped around 20 tons of barium, copper, lead, and zinc into the bay.
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