When do the LNAV and VNAV NPS pointers appear in the PFD of a B737NG?
The lateral NPS will be present if there is a defined LNAV track active, and the APPROACH mode (i.e. to track an ILS) is not active. The vertical NPS is inhibited until the FMC-computed Top-Of-Descent point, so it won't be present during an intermediate level-off during an RNAV departure. It's also inhibited after GS Capture, since the ILS glideslope is then primary &amp; having the NPS would be distracting &amp; unhelpful.