IRFP-02
IR Review
(a) VDP is a point on the final approach
course from which normal descent to
touchdown point may be commenced,
provided visual reference IAW FARs
are established: approach light
system, runway threshold, threshold
markings, threshold lights, REIL, VASI
touchdown zone, markings for lights,
runway lights. If you descend prior to
VDP, you may be below a safe
glideslope. If you are not visual at the
VDP and continue to the MAP
(perfectly legal), you may be above a
safe glideslope (high descent rate/land
long).
(b) Terps box lists minimums for
approaches, including:
(i)
Decision height (DH): MSL
altitude at which a decision must
be made, during a precision
approach, to continue or execute
a missed approach
(ii) Minimum descent altitude (MDA):
MSL altitude on nonprecision
approach that you cannot
descend below until criteria of part
91.175 is met and a safe landing
can be made (3710)
(iii) Height above touchdown (HAT):
AGL height of DH or MDA above
highest point on first 3,000 ft of
runway
(iv) Height above airport (HAA): AGL
height of MDA above published
field elevation. Associate with
nonprecision circling approaches
(8-97) Original
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