1:10 flight time makes sense from last location to Pulau Perak? What would the average speed be, considering they might have been flying low (but not too low as apparently military radar saw them)?
How much more flying time would they at that point have (min/max taking above average speed) and what airports would be reachable (where you can put down a 777) taking the initial computed average speed from last location to Pulau Perak?