Malaysia Airlines Flight 370 information about Flight 370; he opined that, based on known information, "MH370 never left Malaysian airspace." The watch supervisor at Kuala Lumpur ACC activated the Kuala Lumpur Aeronautical Rescue Coordination Centre (ARCC) at 05:30, more than four hours after communication was lost with Flight 370. The ARCC is a command post at an Area Control Centre that coordinates search-and-rescue activities when an aircraft is lost. Malaysia Airlines issued a media statement at 07:24 MYT, one hour after the scheduled arrival time of the flight at Beijing, stating that communication with the flight had been lost by Malaysian ATC at 02:40
Timeline of Malaysia Airlines Flight 370 soon discounted and a search of a remote region of the southern Indian Ocean, led by Australia, began on 18 March. On 24 March, Malaysia Airlines and Najib announced that the flight had ended in the Southern Indian Ocean without survivors. In early April, an intense effort—the "acoustic search"— was made to detect the acoustic signals generated by underwater locator beacons (ULBs, also known as "pingers") attached to the flight recorders on Flight 370. After immersion in water, the ULBs emit an acoustic signal (also called a "ping") at a specific frequency once per second and have a battery life