SN4 was recovered in March 2010 during Cruise MARM10_01 by R/V Yunus, and was redeployed after servicing (see CRUISE REPORT MARM10_01 http://www,ismar.cnr,it) ..
The recovery of the INGV's SN-4 at the entrance of the Gulf of Izmittook place evening of 2010-10-03. After several attempts of unsuccessful releases, a multibeam survey located it about 100m SE of March 2010's deployment, A ROV dive confirmed the possible target as the SN4, that was found to be tilted and turned over the bottom, with release mechanism buried in sediment. The last ROV dive was able to drive a hook into the frame and the SN4 was recovered by ship's winch (Fig.15). A quick analysis of the data revealed that the system was moved end of september, a few weeks before our arrival.
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