Turtle (DSV-3) is a 16-ton, manned deep-ocean research submersible owned by the United States Navy. It is sister to Alvin (DSV-2), and also an Alvin class Deep Submergence Vehicle. The Turtle was retired from active service in 1998. It now resides at the Mystic Aquarium in Mystic, Connecticut
The Turtle was designed to dive to 6000 feet. When DSV-2 Alvin installed a new titanium hull, the Alvin steel hull was installed in the Turtle. The Turtle depth rating was then increased to 10,000 feet. It has a hull 2 inches thick, and a hatch about 3-1/2 inches thick held in place by the pressure of the water above it (it is tapered, narrower inward). The Alvin-class DSV's were designed to replace older DSV, such as the less maneuverable Trieste-class bathyscaphes.
In fiction, she was featured in the 1980 film Raise the Titanic; she was one of several submersibles in the salvage fleet, and one of two (along with the fictional NUMA submersible Deep Quest) that actually discovered the wreck.
Alvin class DSV
- Deep Submergence Vehicle
- Deep Submergence Rescue Vehicle
- Bathyscaphe Trieste (DSV-0)
- Bathyscaphe Trieste II (DSV-1)
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