The FAR require you to have the runway environment in sight before
descending from the MDA. Reaching VDP is not an authorization to
descend below MDA. You must have the runway environment in sight. The
purpose of VDP is to help you make a comfortable glide to the runway.
You can treat the VDP as the point beyond which you cannot make a
normal landing to the runway. If you pass the VDP without runway in
sight, start getting ready for the missed approach. Then begin the
missed approach after passing the MAP.



MH wrote in message ...
Sure, but it doesn't answer my question which more a regulatory one. Are
you "not supposed to" or "not authorized to"?

Capt.Doug wrote:
"Bob Gardner" wrote in message If you
fly the approach as if no VDP is provided, you will maintain the MDA until
you either pick up the runway visually or reach the MAP.


If I pass the VDP without seeing the runway environment, I know that I won't
likely make the runway from the MAP. After passing the VDP, I start
preparing for the missed approach.

D.