Boeing ND
Interested in your opinion re use of the ND during approach. Boeing says leave it in MAP mode. During VOR approach the PNF should use VOR to backup the raw data. During ILS both pilots have raw data on the PFD yet many airlines require the PNF to select APP mode. In my opinion this does not add anything of value, and takes away a lot of info needed for backup, including a picture of the approach, the waypoints, crossing heights, navaids, missed approach track, ground track and (most important when doing the LOC intercept) the trend vector.
Can anyone who uses APP mode justify this?