Originally Posted by
e6bpilot
I J/S on a Delta 737 and they used approach mode when on a vector for a real (not visual) ILS. Nobody died. Although I didn't query the crew, I assumed this (along with setting the MAA) was their procedure.
Delta guy here, interesting discussion.
Procedurally it is acceptable at delta to arm APP on the dogleg. However it is taught as a best practice to do it the way you do—not arm APP till established on LOC.
Partly to mitigate risk of false glideslope, also to avoid it climbing to capture the glideslope—which I have seen occur.
Can do non ILS in IAN or VNAV. IAN is pushed. Personally I prefer IAN, but VNAV works just fine.
I was always under impression y’all didn’t buy IAN. I thought it was a software option.