Old 09-12-2021, 11:51 AM
  #14  
dckozak
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Joined APC: May 2005
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Looking back at the OP's question, quick and easy inflight planning, using an FMS for a tactical problem is something that could be better taught, depending on where and who has provided your training and guidance for your current jet. To the point of most posters responding to the OP, the FAR's provide a pretty clear plan for dispatch, re: fuel required, but leave a lot to the interpatation of how en route to decide how much is acceptable for a divert. The FMS that most of us use, I believe, has several functions which will compute something but none can tell you how much fuel you should have when you finally touch terra firma. The old adage, "Sh!t in, Sh!t out" regarding computations, absolutely applies here. Aviation is full of variables that the Administrator, weather office and company flight standards can't all provide guidance for. Sometimes you just have to point the jet in the right direction and use your gut as to how long you can loiter before landing somewhere you, your passangers, or your employer would rather you didn't. Thats why they pay us the big bucks.
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