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Arrival Procedures

FIG 5−4−25

SOIA Approach Geometry



The stabilized approach point is a design point along the extended centerline of the intended land-

ing runway on the glide slope/glide path at 500 feet above the runway threshold elevation. It is

used to verify a sufficient distance is provided for the visual maneuver after the offset course ap-

proach DA to permit the pilots to conform to approved, stabilized approach criteria. The SAP is

not published on the IAP.


Course DA

The point along the LDA, or other offset course, where the course separation with the adjacent

ILS, or other straight-in course, reaches the minimum distance permitted to conduct closely

spaced approaches. Typically that minimum distance will be 3,000 feet without the use of high

update radar; with high update radar, course separation of less than 3,000 ft may be used when

validated by a safety study. The altitude of the glide slope/glide path at that point determines the

offset course approach decision altitude and is where the NTZ terminates. Maneuvering inside

the DA is done in visual conditions.




Angle, as determined by the SOIA design tool, formed by the extension of the straight segment

of the calculated flight track (between the offset course MAP/DA and the SAP) and the extended

runway centerline. The size of the angle is dependent on the aircraft approach categories (Cat-

egory D or only selected categories/speeds) that are authorized to use the offset course approach

and the spacing between the runways.


Distance from the offset course approach DA to runway threshold in statute mile



7110.65R CHG 2