MOSCOW, May 9 (RIA Novosti) - Rescue teams are continuing Tuesday an international effort to retrieve the flight recorders of an Armenian plane that crashed off Russia's Black Sea coast last week.
The Kapitan Beklemishev ship with deep-sea sonar has been working at the site of the crash through the night.
One of the rescue ships, the Zaliv, hosts a new Kalmar deep-sea search vehicle designed to locate parts of the wreckage and flight recorders, which are seen as the key to explaining the cause of the tragedy.
The vehicle has been reported to experience some technical problems, but the Russian transportation ministry said it would be ready to start the search for black boxes Tuesday evening.
The Cheliken ship from the Russian navy is expected to arrive at the site on Wednesday bringing the number of Russian rescue ships to four.
French specialists with equipment needed to search for the flight recorders are also expected to arrive in Sochi, a Russian resort near the site the tragedy, on Tuesday.
The transportation ministry Monday set emergency headquarters to organize technical assistance in an effort to recover parts of an Airbus A-320 airliner that crashed into the sea on Wednesday, killing all 113 people on board.
Fifty-one bodies have been recovered so far at the site of the crash.
