이 절차는 5-8 절, Instrument Approach Procedure Charts, subparagraph a7(b), Approach with Vertical Guidance (APV) 에 나와있다. 이들은 "LDA / Glideslope" 라는 메모와 함께 instrument approach chart 의 plan view 에 주석이 달려 있다. Because the final approach course is not aligned with the runway centerline, additional maneuvering will be required compared to an ILS approach.ģ. LDA minima for with and without glideslope is provided and annotated on the minima lines of the approach chart as S − LDA/GS and S − LDA. These are annotated in the plan view of the instrument approach chart with a note, “LDA/Glideslope.” These procedures fall under a newly defined category of approaches called Approach with Vertical Guidance (APV) described in paragraph 5 − 4 − 5, Instrument Approach Procedure Charts, subparagraph a7(b), Approach with Vertical Guidance (APV). A very limited number of LDA approaches also incorporate a glideslope. Circling minimums only are published where this alignment exceeds 30 degrees.Ģ. Straight − in minimums may be published where alignment does not exceed 30 degrees between the course and runway.
The LDA course usually provides a more precise approach course than the similar Simplified Directional Facility (SDF) installation, which may have a course width of 6 or 12 degrees.ġ. The LDA is of comparable use and accuracy to a localizer but is not part of a complete ILS.
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