Meanwhile, Malaysia's acting transport minister Hishammuddin Hussein, in a Twitter post, said Malaysian authorities are now considering the possibility of deploying more autonomous underwater vehicles (AUVs).
Hishamuddin defended his government's handling of the operation and accused the media of focusing on the Chinese families. He said relatives of other nations represented have not had problems.
"The most difficult part of any investigation of this nature is having to deal with the families in our case," he said in Kuala Lumpur.
Hishammuddin said his country will not back down from searching for the plane, despite Australia announcing that the Bluefin-21 may cease scouring the Indian Ocean, if no trace of the aircraft is found within a week.
Authorities probing the criminal aspects of the missing Malaysian jet have conducted a "chronological re-enactment" of the flight before it took off from here six weeks ago.
Investigators yesterday carried out a chronological re- enactment of everything they believed had happened before the plane took off.
The Beijing-bound Malaysia Airlines flight MH370 - carrying 239 people, including five Indians, an Indo-Canadian and 154 Chinese nationals - had mysteriously vanished on March 8 after taking off from Kuala Lumpur.
