Datayq1,
Course corrections between 17:21 and 18:25 are toward the relative position of the satellite therefore there is no beam disconnect.
Something has to break the beam (the wing or crown of the aircraft, geographic features or another aircraft) for a reacquire to occur. A SATCOM communication from the aircraft will also cause a reacquire.
Last edited by MrPeabody; 1st May 2014 at 08:16.
Reason: Added last sentence.