WHOI  WHOI People  

Remotely Operated Vehicle Jason/Medea

Jason and Medea are a remotely operated vehicle (ROV) system designed and built by WHOI’s Deep Submergence Laboratory to allow scientists to have access to the seafloor without leaving the deck of a ship.

Jason is a two-body ROV system. A 10-kilometer (6-mile) reinforced fiber-optic cable delivers electrical power and commands from the ship through Medea and down to Jason, which then returns data and live video imagery. Medea serves as a shock absorber, buffering Jason from the movements of the ship, while providing lighting and a bird’s eye view of the ROV during seafloor operations.

Jason is equipped with sonars, video and still imaging systems, lighting, and numerous sampling systems. Jason’s manipulator arms collect samples of rock, sediment, or marine life and place them in the vehicle’s basket or on “elevator” platforms that float heavier loads to the surface.

Pilots and scientists work from a control room on the ship to monitor Jason’s instruments and video while maneuvering the vehicle. The average Jason dive lasts one to two days, though operators have kept the vehicle down for as long as seven days.

Jason was first launched in 1988, and the system has been used for hundreds of dives to hydrothermal vents in the Pacific, Atlantic, and Indian Oceans. ROV Jason is now in its second generation, with a sturdier, more advanced vehicle having been launched in 2002.

The ROV also has had a successful side career in underwater archeology. A prototype version named Jason Jr. was used to survey the wreck of RMS Titanic, and the fully developed Jason visited a 1,600-year-old Roman trading ship in 1989. Jason and Medea are named for the adventurous ocean explorer of Greek mythology and for his wife.

Related Multimedia

Go Down Jason, Let My Mooring Go
WHOI-Operated ROV Jason Images the Discovery of the Deepest Explosive Eruption on the Sea Floor

ROV Jason Images the Discovery of the Deepest Explosive Eruption on the Sea Floor

May 2009
Oceanographers using the remotely operated vehicle (ROV) Jason discovered and recorded the first video and still images of a deep-sea volcano actively erupting molten lava on the seafloor.

NW Rota 2009 Expedition to the Mariana Volcanic Arc

NW Rota 2009 Expedition to the Mariana Volcanic Arc

April 3-17, 2009
An international science team studied an erupting undersea volcano near the Island of Guam and captured dramatic new video and still images of the eruptive activity of NW Rota-1.

ROV Jason
videoVIDEO

ROV Jason

WHOI Engineer Will Sellers talks about the latest generation of sub-sea exploration vehicle ROV Jason.
» iPod compatible
» MP3 (audio)

View Video (Media Player)

View Video (Quicktime)

jason to the rescue
videoVIDEO

Jason to the Rescue

During an expedition to the East Pacific Rise in May 2007, the robotic undersea vehicle frees instruments glued to the seafloor by hardened lava.

Sights and Sounds of a Submarine Volcano
videoVIDEO

Sights and Sounds of a Submarine Volcano

WHOI expedition leader Will Sellers talks about the adventure of deep-sea research at an erupting underwater volcano.

View Video (Quicktime)

View Video (Media Player)

Additional Resources