"Spasatel Demidov" took part in the rescue operation in the Black Sea.

Rescuer «Spasatel Demidov» and tugboat «Mercury» have managed to detect signals coming from an emergency radio beacon of a Su-27 aircraft that went missing in the Black Sea on Wednesday night, a source in Russia’s maritime operations services told TASS.

 "Search in the crash zone continues. The aircraft fell into the sea, the crew is yet to be found," the source said.

A source in the Federal Agency for Maritime and River Transportation (Rosmorrechflot) said: «Multipurpose rescue vessel « Spasatel Demidov» and a tugboat « Mercury » have arrived to the crash zone, but the search and rescue effort is complicated by bad weather.

 "Weather conditions are difficult, water temperature is 9 degrees Celsius, with strong winds and waves. Visibility is poor," the source said.

 A Rosmorrechflot spokesperson said the search mission would continue in nighttime.

 "There was no order to suspend the search for the night. As long as there is hope of finding survivors, the search will continue," he said.

«Spasatel Demidov» is a unique multifunctional salvage vessel by it equipment and available technology, built in 2013 by the Nevsky Shipyard, commissioned by the Federal Agency for Maritime and River Transport of the Ministry of Transport of Russian Federation for Morspasluzhba of Rosmorrechflot.

In total, the Nevsky Shipyard built four ships of the MPSV07 project. Designer - Marine Engineering Bureau.