Manual of Standards Part 173—Standards Applicable to Instrument Flight Procedure Design
(i) clearance from airspace is determine(i) clearance from airspace is determined using a combination of vertical and horizontal dimensions:
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(i) clearance from airspace is determined using a combination of vertical and horizontal dimensions:
(A) vertically, the height of the nominal aircraft position in a missed approach is determined by applying the techniques of PANS-OPS Vol II, or ICAO Doc 9905 missed approach criteria, using a gradient of 5% from the SOC to the missed approach altitude;
(B) if this height conflicts with airspace, then horizontally a 1 NM buffer is provided between the airspace boundary and the missed approach primary area.
Note: If airspace considerations require a nominal gradient greater than 5%, the IAL chart must show a climb gradient identified by an asterisk.