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Instrument: ROV Jason
Acronym: ROV Jason
External Identifier:
Description
The Remotely Operated Vehicle (ROV) Jason is operated by the Deep Submergence Laboratory (DSL) at Woods Hole Oceanographic Institution (WHOI). WHOI engineers and scientists designed and built the ROV Jason to give scientists access to the seafloor that didn't require them leaving the deck of the ship. Jason is a two-body ROV system. A 10-kilometer (6-mile) 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. During each dive (deployment of the ROV), Jason pilots and scientists work from a control room on the ship to monitor Jason’s instruments and video while maneuvering the vehicle and optionally performing a variety of sampling activities. Jason is equipped with sonar imagers, water samplers, video and still cameras, and lighting gear. 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. More information is available from the operator site at URL.
During the ROV Jason dives for this cruise, two types of sampling were conducted: injector push cores or.sediment scooped into chamber pots each injected with one of three types of preservatives: RNAlater, formalin, or glutaraldehyde.
The Hydrothermal Organic Geochemistry (HOG) sampler was designed to collect hydrothermal fluids for biogeochemical and microbiological analyses. It consists of seven 2-liter and two 11-liter sample chambers for natural abundance geochemistry connected to a titanium intake nozzle with an in situ temperature probe. A second titanium intake nozzle with an in situ temperature probe is connected to seven 2-liter sample chambers devoted to incubation experiments, and five Sterivex filters for trapping microbial cell-sized particles. The HOG Sampler was deployed on all but one dive and is described in more detail in the methods section of the cruise report. Temperatures were measured with NKE Instrumentation Temperature sensors (P/N S2T6000-Ti-DH; P/N 60-07-326-002).
Hydrothermal fluid samples were collected from actively venting chimneys at the Lost City hydrothermal field using ROV Jason during the 2018 Lost City expedition aboard R/V Atlantis (AT42-01). This study includes 39 samples of hydrothermal fluids that were dedicated to DNA and RNA sequencing, including analyses of amplicon sequence variants (ASVs), metagenomes, and metatranscriptomes.
©2020 Biological and Chemical Oceanography Data Management Office.