Advisory Circular 150/5390-2, Heliport Design, provides
recommendations for heliport design to support
non-precision, approach with vertical guidance (APV),
and precision approaches to a heliport. When a heliport
does not meet the criteria of this AC, FAA Order
8260.42, Helicopter Global Positioning System (GPS)
Nonprecision Approach Criteria, requires that an
instrument approach be published as a SPECIAL
procedure with annotations that special aircrew qualifications
are required to fly the procedure. Currently
there are no operational civil IFR heliports in the U.S.
although the U.S. military has some nonprecision and
precision approach procedures to IFR heliports.