II. Technical Subject Areas C. Regulations and Publications Related to IFR Operations 8. Standard Instrument Approach Procedure Charts (IAPs) a. IAPs satisfy US Standard for Terminal Instrument Approach Procedures (TERPs) criteria and provide the method to descend and land safely in low visibility condtions b. IAP chart elements 1) Margin identification (top and bottom margins) a) Chart reference number and approval authority b) Amendment status, effective date (00123 = 123rd day of 2000) c) Name of city, airport d) Approach name i) Derived from type(s) of NAVAID(s) providing guidance for (and thus needed to fly) the final approach course "/" => both required (VOR/DME RWY 6) "or" => either OK (VOR or GPS RWY 24) ii) Includes runway number if final approach course within 30° of that runway, e.g. VOR RWY 23 (otherwise name includes a letter starting with A, as in VOR A) iii) Parallel runways distinguished by R, L, or C as in ILS 24R and ILS 24L iv) Multiple same-type approaches to one runway distinguished by letter starting with Z (ILS Z RWY 4 and ILS Y RWY 4) 2) Plan view a) Graphic overhead depiction b) Elements defined in legend in section G in front part of TPP booklets 3) Profile view a) Side view depicting altitudes, headings, distances, fixes b) Elements defined in legend in section H in front part of TPP booklets 4) Minimum and notes section a) Lowest altitude and visibility requirements b) Procedural notes 5) Airport diagram a) Sketch of airport b) Approach lighting 6) RNAV IAP charts a) IAP charts are being converted to RNAV IAP chart format b) Key information, including communication frequencies and MAP, in boxes near top of IAP c) RNAV minima c) Terminology i) DA (decision altitude) replaces DH (decision height) ii) MDA (minimum descent altitude) for LNAV only and circling iii) TCH (threshold crossing height) applies to height of "descent angle" or glidepath at runway threshold c. IAPs are published in the US Terminal Procedures publication booklets (TPPs)every 56 days (8 weeks) with mid-cycle revisions ("Change Notices") by the NACOof the FAA; and are available online on the NACO website d. US military IAPs are published by the DOD e. Special IAPs may be approved by the FAA for use by specific individual operators References Instrument Flying Handbook, FAA-H-8083-15, 2001 AIM NACO TPPs