"Rolldock Star" semi-submersible ship -- February 2, 2014
|Track of "Rolldock Star" is at traveled between Singapore and India -- April 19-28, 2016|
|"Rolldock Star" moves to deep-water area -- May 4, 2016|
"Rolldock Star" departed Singapore on April 19 and arrived in Mumbai (Jawaharlal Nehru Port) on April 28. On May 4, the ship departed port and proceeded to an area about one-half nautical mile to the north. Over the next two days, the vessel remained in the deep-water area, where it likely onloaded its cargo. "Rolldock Star" departed the area during the evening hours of May 6 with a reported destination of Severodvinsk (estimated arrival date: June 12).
|Track of "Rolldock Star" as it departs Mumbai -- May 6, 2016|
Given the earlier statement of the submarine's arrival in Severodvinsk in June and the reported destination of "Rolldock Star", it's pretty clear that the Dutch semi-submersible ship is currently ferrying "INS Sindhukesari" to Russia.