Port Vale - those co-ordinates are only just over 100 km from Ho Chi Minh City and 50 km offshore, in what I would imagine would be very busy shipping waters. Also would suspect radar coverage there, and this would be appx an hr further into the flight than the last reported contact? EDited to add PortVale has added a map to his post which I was unable to do.
Last edited by thelearner; 10th Mar 2014 at 12:33.
Reason: updated