there is a 50 nm routing req from any land mass at all times.
climb performance is a problem (less than 1000 feet a min up to 10,000, then about 500 ft a min up to fl 200, for most suitably powered a/c) so terrain a big factor.
noise, is pretty loud.
and she sinks like a brick on the descent.
270-280 kts at 20000 will roughly double the flt time.
did one, surabaya-sin on a 310. circled round the field thrice to gain alt. due to the central javan range of mountains. and southern sumatra.
it does take preparation as it is not something you just jump into the seat and go.
