Question

Choose the best statement concerning the Visual Descent Point (VDP) on the KHPN RNAV (GPS) Y Rwy 34.

1) It is 1.3 NM from RW34 while on the LPV approach.
2) It is 1.3 NM from RW34 while on the LNAV/VNAV approach.
3) It is 1.3 NM from RW34 and applicable only while using LNAV for the approach.
4) There is no VDP on this approach.

Answer 1

The best statement regarding the Visual Descent Point for the KHPN RNAV (GPS) Y Rwy 34 approach is that it is 1.3 NM from RW34 while on the LNAV/VNAV approach. LNAV/VNAV approaches provide vertical navigation guidance which includes a VDP, unlike LPV or LNAV-only approaches.

Step-by-step explanation:

The Visual Descent Point (VDP) is a specified point on the final approach course of a nonprecision straight-in approach procedure from which a normal descent from the minimum descent altitude (MDA) to the runway touchdown point may be commenced, provided adequate visual reference is established. The VDP is important for pilots to identify so that they don't descend too quickly or too late during final approach, which ensures a safe landing. Looking at the RNAV (GPS) Y Rwy 34 approach at Westchester County Airport (KHPN), the VDP would vary depending on the type of approach being utilized.

Of the provided statements, the correct one concerning the VDP for the RNAV (GPS) Y Rwy 34 approach at KHPN is:

• Option 2: The VDP is 1.3 NM from RW34 while on the LNAV/VNAV approach.

This is because LNAV/VNAV approaches typically provide vertical navigation guidance for the approach procedure that includes a VDP. The LPV approach would have its own descent profile using the glideslope, and a VDP may not.apply Similarly, an LNAV-only approach might not have precise vertical guidance, and thus a VDP would be more critical, but not necessarily at the same distance from the runway as with LNAV/VNAV.