12/31/20 AIM This paragraph has been completely rewritten. Significant changes include an updated explanation of Standard Service Volumes (SSVs) and how they are used in a PBN NAS, revised tables that incorporate new classes of VOR and DME, and new graphics depicting the new SSVs have been placed appropriately with corresponding text. This change removes references to TIBS and TWEB as these services are no longer provided by Flight Service. The minimum distance between parallel runways that permits simultaneous independent approaches has been reduced from 3000 feet to 2500 feet, along with the need for high update rate surveillance. Figures that address this issue have been updated to reflect this change. This revision will update FIG 5 − 4 − 20 and FIG 5 − 4 − 23. Because these systems are programmed to make decisions that would normally fall upon the pilot − in − command and deviate as necessary to save lives and property, this change is to make the controller aware that an emergency autoland system or an emergency descent mode system may be in control of the aircraft. This change deletes inflight contingency procedures which will be out of date in subparagraph 7 − 1 − 14 c. The procedures will be updated in the AIP, where they belong. Editorial changes include the removal of a reference to a canceled Advisory Circular in paragraph 4 − 1 − 10. Another editorial change updates U.S. State Department contact information in paragraph 5 − 6 − 8. An editorial change removes an unnecessary “is” in paragraph 4 − 5 − 7. Finally, a reference to “56 weeks” in paragraph 9 1 − 4 was corrected to “56 days.” This change deletes verbiage to Final Approach Runway Occupancy Signal (FAROS) and Runway Intersection Light (RIL) systems content, including revision of figures representing their removal. Explanation of Changes E of Chg − 1 Effective: December 31, 2020 Aeronautical Information Manual Explanation of Changes b. 1 − 1 − 9. INSTRUMENT LANDING SYS- TEM (ILS) a. 1 − 1 − 8. NAVIGATIONAL AID (NAVAID) SERVICE VOLUMES e. 5 − 4 − 13. SIMULTANEOUS APPROACHES TO PARALLEL RUNWAYS 5 − 4 − 16. SIMULTANEOUS CLOSE PAR- ALLEL PRM APPROACHES AND SIMULTA- NEOUS OFFSET INSTRUMENT APPROACHES (SOIA) This change removes references to Multi − Function Transport Satellite (MTSAT). 5 − 1 − 9. INTERNATIONAL FLIGHT PLAN (FAA FORM 7233 − 4) IFR FLIGHTS (FOR DOMESTIC OR INTERNATIONAL FLIGHTS) 5 − 3 − 1. ARTCC COMMUNICATIONS c. 1 − 1 − 18. WIDE AREA AUGMENTATION SYSTEM (WAAS) d. 2 − 1 − 6. RUNWAY STATUS LIGHT (RWSL) SYSTEM 2 − 1 − 7. STAND − ALONE FINAL AP- PROACH RUNWAY OCCUPANCY SIGNAL h. Editorial Changes g. 7 − 1 − 14. PROCEDURES FOR WEATHER DEVIATIONS AND OTHER CONTINGEN- CIES IN OCEANIC CONTROLLED AIRSPACE f. 6 − 1 − 1. PILOT RESPONSIBILITY AND AUTHORITY 4 − 1 − 3. FLIGHT SERVICE STATIONS 7 2. FAA WEATHER SERVICES − 1 − 5. PREFLIGHT BRIEFING 7 8. TELEPHONE INFORMATION BRIEFING SERVICES (TIBS) 7 − 1 − 9. TRANSCRIBED WEATHER BROADCAST (TWEB) (ALASKA ONLY) 7 − 5 − 6. MOUNTAIN FLYING APPENDIX 3. ABBREVIATIONS/ACRONYMS