By Rachel Teasdale
Winds and seas have been gradually building and are expected to interfere with dive operations over the next few days.
What’s happening today?
Jason and Sentry completed their first dives yesterday. We are recovering instrument moorings and conducting CTD casts today.
|Axial Seamount 2015 Expedition video of ROV Jason with perspectives on how it is used for conducting science at sea. Video by Jesse Crowell in association with Saskia Madlener at 77th Parallel Productions. Music by James Andrew Menking|
|Jason (above) and Medea (below-left) on board the Thomas G Thompson.|
The Remotely Operated Vehicle (ROV), Jason works in tandem with Medea, both of which are operated “remotely” from the ship (see images at right). Medea is cabled to the ship and Jason is tethered to Medea, with the same fiber optic cable. Medea and Jason are controlled onboard the Thompson, from the Jason “control van,” where Jason pilots operate the vehicles.
Medea hovers above Jason as it works on the seafloor. Tethered approximately 40 m (128 ft) above Jason, Medea has a belly camera and lighting, which gives the ROV pilots a bird’s- eye view of Jason at work below. Medea is also important because it buffers any sharp movements from the ship, so Jason doesn’t get yanked while at work. The duo are named for the story in Greek mythology of Jason who, with Medea’s help, had to retrieve the Golden Fleece so he could regain his position as king.
The ROV Jason can work around the clock. Ten video cameras send images to the surface for ROV pilots and the science team to observe throughout the duration of the dive. Scientists typically have a specific dive plan, but details can be modified based on what they see in the Jason videos. Because power is supplied by the ship, ROV Jason dives can last several hours to several days.
|Graphic of research vessel, Medea and Jason, from WHOI, http://www.whoi.edu/page.do?pid=80696&i=17162|
|ROV Jason and manipulator arm.|
|ROV Jason’s sample basket in extended position during dive J2-820, with sampling instruments and hydraulic arm.|
In his off-time, Jason Pilot, Korey Verhein has been developing a Lego version of Jason (see photo at below). Korey has started an official campaign through “LEGO Ideas,” which requires him to get 10,000 votes in support of the LEGO
|Jason-LEGO Idea designed by Korey Verhein.|
More information about Jason and Medea can be found at: http://www.whoi.edu/ndsfVehicles/Jason/
More information about Korey’s Jason- LEGO project can be found at: