Last Radar Contact Lat/lon
I thought that the last radar contact position @ 18:22 was approximately 6°35'53.39"N, 96°17'45.71"E, so getting at far as 7°20'24.52"N, 95° 7'46.74"E by 18:33 is very practical at 480 knots or so. From there and a little more west, due 194T avoids the NW tip of Indonesia. I'm not saying that's what happened though. I wonder if the radar at Lhokseumawe was operating that night.