Human Occupied Vehicle (HOV) Alvin is part of the National Deep Submergence Facility (NDSF). Alvin enables in-situ data collection and observation by two scientists to depths reaching 6,500 meters, during dives lasting up to ten hours.
Commissioned in 1964 as one of the world’s first deep-ocean submersibles, Alvin has remained state-of-the-art as a result of numerous overhauls and upgrades made over its lifetime. The most recent upgrades, begun in 2011 and completed in 2021, saw the installation of a new, larger personnel sphere with a more ergonomic interior; improved visibility and overlapping fields of view; longer bottoms times; new lighting and high-definition imaging systems; improved sensors, data acquisition and download speed. It also doubled the science basket payload, and improved the command-and-control system allowing greater speed, range and maneuverability.
With seven reversible thrusters, it can hover in the water, maneuver over rugged topography, or rest on the sea floor. It can collect data throughout the water column, produce a variety of maps and perform photographic surveys. Alvin also has two robotic arms that can manipulate instruments, obtain samples, and its basket can be reconfigured daily based on the needs of the upcoming dive.
Alvin's depth rating of 6,500m gives researchers in-person access to 99% of the ocean floor. Alvin is a proven and reliable platform capable of diving for up to 30 days in a row before requiring a single scheduled maintenance day. Recent collaborations with autonomous vehicles such as Sentry have proven extremely beneficial, allowing PIs to visit promising sites to collect samples and data in person within hours of their being discovered, and UNOLs driven technological advances have improved the ability for scientific outreach and collaboration via telepresence
Alvin is named for Allyn Vine, a WHOI engineer and geophysicist who helped pioneer deep submergence research and technology.
A NERC and NSF-funded trip to study the biology, geology, and climate history of the Galápagos seafloor
Scientists, engineers, vehicle operators, and ship crew from the Woods Hole Oceanographic Institution (WHOI) will be a featured part of the upcoming BBC program, Blue Planet Live, which will air over four nights beginning March 24. The series will include two live broadcasts from the research vessel Atlantis showing launch and recovery of the human-occupied submersible Alvin.
Alvin, the country’s only deep-diving research submersible capable of carrying humans to the sea floor, reached another milestone in its long career on Nov. 26, 2018, when the sub made its 5,000th dive during an expedition to the Guaymas Basin in the Gulf of California.
The Woods Hole Oceanographic Institution (WHOI) announces that the Human Occupied Vehicle (HOV) Alvin has achieved certification from the U. S. Naval Sea Systems Command (NAVSEA) for operations to its rated depth of 4,500 meters (approx. 2.8 miles). Two dives were conducted in the waters off Arica, Chile, on January 26-27 from the research vessel Atlantis, demonstrating vehicle performance in accordance with the specified metrics required for certification. NAVSEA representatives were on hand to monitor the process and participate in the dives.
We know more about the surface of other planets than we do about Earth’s ocean. And what is known about our ocean would not have been possible without the deep-sea […]
WHOI in the News
Duke University Stories
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Journal of Ocean Technology
An Advanced Platform for Direct Deep Sea Observation and Research
Dive Deeper: Alvin Takes You There
Explore the sub, meet the scientists, and learn how Alvinenables ocean exploration and research
Special Multimedia Feature
Inside the Alvin sphere
Take a 360 tour inside the sphere where researchers and the Alvin pilot sit while exploring the deep sea.
Alvin Around the World
Alvin Dive Sites (1988 to present)
See where Alvin has been and what it has found. (Requires Google Earth)