Jason/Medea User Manual


The Jason Remotely Operated Vehicle (ROV) system is operated by the Deep Submergence Laboratory (DSL) at the Woods Hole Oceanographic Institution as part of the National Deep Submergence Facility (NDSF).

Two Body System and Cable Dynamics

The Jason ROV system dives to depths of 6,500 m and is operated as a two-body system, composed of Jason and another vehicle that acts as a suppressor weight, Medea. The two vehicles are connected by a neutrally-buoyant umbilical. Medea serves as a buffer between the ROV and the ship, and prevents the umbilical tether from tugging on the ROV as the ship rises and falls with sea state. Medea also reduces the total load on the umbilical, which is the primary limiting factor in the operation of an ROV that dives to these depths. Since Medea is equipped with down-looking cameras, it also provides a bird’s eye view of the ROV during seafloor

Support Vessel

The Jason/Medea system can be operated from a variety of support vessels. The support vessel must have a dynamic positioning (DP) system and sufficient deck space and displacement to accommodate the Jason winch system, launch and recovery system, control vans, tool van and equipment storage van. Most of the larger UNOLS ships work well and are preferred as Jason support vessels.