During its second year after deployment, the inductive modem on ITP 8 apparently failed, although the profiler continued to ring the surface package after every scheduled profile. Consequently, there was great interest in recovering the unit to retrieve the information stored in the underwater unit. Early on October 3, 2009, a helicopter reconnaissance successfully found the surface package only minutes away from ceasing the search.
An hour later, a team and apparatus arrived on the ice floe to begin the recovery operation. A hot water drill ring apparatus was used to cut a 36” ice core around the buoy, which was removed from the buoy tether with a chainsaw. The tether wire was hauled using a portable hydraulic block until the profiler arrived at the surface tangled in the wire, and upside down. Mud and scratches on the profiler indicated that it had dragged on shallow topography (presumably in the Chukchi region according to the drift track).
After the 4.5 hour recovery operation, ITP 8 was transported back to the ship and ITP 32 was deployed in the same hole. Later on the ship, the much anticipated missing data were retrieved from the profiler on ITP 8.
More information and photos on the recovery operation are also available at: http://www.whoi.edu/beaufortgyre/dispatch2007/dispatch17.html.