A deep-sea search for Malaysia Airlines Flight MH370 has resumed in the Indian Ocean, more than a decade after the plane vanished with 239 people on board, reviving one of aviation's most enduring mysteries.

Malaysia’s Transport Ministry said on Wednesday that the search vessel Armada 86 05 had arrived at a designated search area, carrying two autonomous underwater vehicles. The exact location of the search zone was not disclosed. The ministry added that the vessel had prepared for the operation at Fremantle Port in Western Australia.

While the statement did not specifically name the company leading the mission, the vessel has been widely identified by maritime and aviation sources as belonging to Ocean Infinity, the Texas-based marine robotics firm. Ocean Infinity had previously conducted a search for MH370 in 2018 under a “no-find, no-fee” agreement but found no trace of the aircraft.

Earlier this month, the Malaysian government confirmed that Ocean Infinity would resume the seabed search under a renewed contract. The company has upgraded its technology and refined its analysis since the last search. CEO Oliver Plunkett said last year that the firm had worked with multiple experts to narrow down the search zone to the most probable crash site.

Ocean Infinity briefly restarted operations earlier this year in a new 15,000-square-kilometre area of the southern Indian Ocean, but the effort was suspended in April due to poor weather. The company has confirmed it is resuming the search but declined to comment further, citing the “important and sensitive nature” of the operation.

MH370 disappeared from radar shortly after taking off from Kuala Lumpur for Beijing on 8 March 2014. Satellite data later indicated that the aircraft veered off its planned route and flew south towards the remote southern Indian Ocean, where it is believed to have crashed. The reason for the course change remains unknown.

A costly multinational search failed to locate the aircraft, although debris believed to be from the plane has washed up along the East African coast and on Indian Ocean islands. No main wreckage or bodies have ever been recovered.