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01:07: The plane sent its last ACARS transmission - a service that allows computers aboard the plane to "talk" to computers on the ground. Some time afterwards, it was silenced and the expected 01:37 transmission was not sent.
it was at 1.07am that the plane’s Acars signalling device sent its last message before being disabled some time in the next 30 minutes, apparently deliberately. A separate transponder was disabled at 1.21am but investigators believe the Acars was shut down before Hamid’s final, 1.19am farewell.
originally posted by: carpooler
My understanding is that the ACARS are discreet, engine attachments, and they could only be shorted out by salt water, or turned off at the two RR engines, not from the flight deck. The Brits may now be back pedalling, but when the search was on in the first weeks, they said that these ACARS kept pinging beyond the fuel range of the airliner.
On 4 February 2018, Seabed Constructor departed the search area at 0200 UTC to commence transit to Fremantle for resupply and crew change. The vessel is expected to arrive port on 8 February and schedule to depart on 12 February 2018 to continue with the search operations
Time (MYT) Time (UTC) Initiated by Name (if any) Details
02:25:27 18:25:27 Aircraft 1st handshake A 'log-on request' message. Flight 370 now registered as an active terminal on Inmarsat network.
02:39:52 18:39:52 Ground station – Ground to aircraft telephone call, acknowledged by SDU, unanswered
03:41:00 19:41:00 Ground station 2nd handshake Normal handshake
04:41:02 20:41:02 Ground station 3rd handshake Normal handshake
05:41:24 21:41:24 Ground station 4th handshake Normal handshake
06:41:19 22:41:19 Ground station 5th handshake Normal handshake
07:13:58 23:13:58 Ground station – Ground to aircraft telephone call, acknowledged by SDU, unanswered
08:10:58 00:10:58 Ground station 6th handshake Normal handshake
08:19:29 00:19:29 Aircraft 7th handshake[h] A 'log-on request' from the aircraft, followed by an acknowledgement and four other transmissions from the ground station.
08:19:37 00:19:37 Aircraft 7th handshake[h] 'Log-on acknowledge' message transmitted by aircraft. This is the final transmission received from Flight 370.
09:15 01:15 Ground station Unsuccessful ping/handshake Three handshake requests from the ground station, without a response from the aircraft.
ACARS (aircraft communications addressing and reporting system) is a digital datalink system for transmission of short messages between aircraft and ground stations via airband radio or satellite.
originally posted by: Zaphod58
a reply to: AndyFromMichigan
Fighters don't operate out of Diego. It's only a fuel stop for bombers and cargo flights usually, although they do sometimes base bombers there for short times. It's too far away for fighters to operate anywhere useful from, and too small to tie up the ramp space with them.