ITP 108 Deployment

One day after deploying the first Ice-Based Observatory (IBO) during JOIS 2017, the second and final IBO of the cruise was deployed including ITP 108. On a sunny but cold day, a floe was visually selected from the ship’s bridge and personnel were lowered over the side of the ship in the manbasket to drill the site to determine thickness. While only 0.5-0.9 m thick, the floe was chosen for the deployments as there did not appear to be netter ice in the vicinity. The ship’s gangway was lowered onto the ice for access by personnel and equipment was lowered using the ship’s crane. The deployment operations took 3 hours in total while ice analyses were also performed by others in the science party at the same time.

More information and photos on the deployment operations are also available at: https://archives.whoi.edu/beaufortgyre/www.whoi.edu/page.do@pid=160036.html

Recovery

Data Processing

Final Data

Jeff O’Brien steadies ice auger while Josh Mitchell and Andrey Proshutinsky bore through 0.5 m thick ice floe for ITP deployment. (Photo by Gary Morgan)

ITP 108 profiler being lowered into the ice hole. (Photo by Rick Krishfield)

Due to the cold temperatures, Proshutinsky assists O’Brien during the profiler inductive modem test by holding a heat gun on the laptop to keep it warm. (Photo by Rick Krishfield)

Jim Ryder controls the ITP winch brake to slowly spool out the mooring wire. (Photo by Rick Krishfield)

Final segment of ITP mooring being assembled. (Photo by Rick Krishfield)