Hello,
747 armchair pilot but 300 hour realworld pilot would like to know genuine, real life reasons for using RTE 2 in the FMC.
I understand its for investigation of other routes, alternate airfield approaches or similar things, but is it used and if so, how and why might you use this?
I understand the FMC otherwise in good detail so feel free to use real terminology. I just fail to see at the moment why you would need it for back-up when you could otherwise update your active route to your second route, no? Or, I can't imagine why the route would change so drastically, so quickly, that you would need a second route option available.
Is this inputed at the gate like the normal FMC or is it optional en-route? I also read a RTE 2 should be left in the FMC at shut-down? Lots of confusing 'armchair pilots' spouting out info so I'd like it from the horses mouth if possible.
Thanks kindly for coming down to my level for a few minutes!
