Originally Posted by
Checkboard
Given that the Westwind which ditched near Lord Howe Island in 2009 did so, in part, due to the crew not completing any competent pre flight planning nor en-route PNR planning - Flight Planning from charts and performance tables is still relevant.
Not for an airliner, generally, as you'll have a lot of computer support for that. But for GA turbines? Yep.
... and calculating PNRs in flight is still required for airliners, as the on-board FMS/FMGS can't do that (not without as much fiddling as a paper calculation would require.)
Surprised you didn't learn PNR stuff at commercial level.