Both of those numbers can't be right. 160 km SW from Pangkalan Bun isn't 1,120 km from the last known position.
That's correct. Seems to me like it should have read, "1120kms from Surabaya airport". Pulau Nangka is certainly in the right area for potential wreckage.
The sea security post location where the report came from, is approx 34NM from LKP of the aircraft. It is also reported that local fishermen reported seeing an aircraft coming down and hearing the crash.
However, it appears those fisherman have yet to be officially interviewed.
http://www.channelnewsasia.com/news/...1/1554532.html