6-5-2. Radio Call Signs 6-5-3. ARFF Emergency Hand Signals . 6-5-1 6-5-1 Chapter 7. Safety of Flight Section 1. Meteorology 7-1-1. National Weather Service Aviation Weather Service Program 7-1-2. FAA Weather Services . 7-1-3. Use of Aviation Weather Products . 7-1-4. Graphical Forecasts for Aviation (GFA) 7-1-5. Preflight Briefing 7-1-6. Inflight Aviation Weather Advisories . 7-1-7. Categorical Outlooks 7-1-8. Inflight Weather Advisory Broadcasts 7-1-9. Flight Information Services (FIS) 7-1-10. Weather Observing Programs 7-1-11. Weather Radar Services . 7-1-12. ATC Inflight Weather Avoidance Assistance 7-1-13. Runway Visual Range (RVR) 7-1-14. Reporting of Cloud Heights 7-1-15. Reporting Prevailing Visibility 7-1-16. Estimating Intensity of Rain and Ice Pellets 7-1-17. Estimating Intensity of Snow or Drizzle (Based on Visibility) 7-1-18. Pilot Weather Reports (PIREPs) 7-1-19. PIREPs Relating to Airframe Icing 7-1-20. Definitions of Inflight Icing Terms 7-1-21. PIREPs Relating to Turbulence . 7-1-22. Wind Shear PIREPs 7-1-23. Clear Air Turbulence (CAT) PIREPs 7-1-24. Microbursts . 7-1-25. PIREPs Relating to Volcanic Ash Activity 7-1-26. Thunderstorms 7-1-27. Thunderstorm Flying . 7-1-28. Key to Aerodrome Forecast (TAF) and Aviation Routine Weather Report (METAR) 7-1-29. International Civil Aviation Organization (ICAO) Weather Formats . 7-1-1 7-1-2 7-1-3 7-1-6 7-1-8 7-1-11 7-1-22 7-1-22 7-1-23 7-1-27 7-1-36 7-1-40 7-1-42 7-1-43 7-1-44 7-1-44 7-1-44 7-1-44 7-1-46 7-1-47 7-1-48 7-1-49 7-1-50 7-1-50 7-1-61 7-1-62 7-1-62 7-1-65 7-1-67 Section 2. Barometric Altimeter Errors and Setting Procedures 7-2-1. General 7-2-2. Barometric Pressure Altimeter Errors 7-2-3. Altimeter Errors 7-2-1 7-2-1 7-2-1 Section 3. Cold Temperature Barometric Altimeter Errors, Setting Procedures and Cold Temperature Airports (CTA) 7-3-1. Effect of Cold Temperature on Barometric Altimeters 7-3-2. Pre-Flight Planning for Cold Temperature Altimeter Errors . 7-3-3. Effects of Cold Temperature on Baro-Vertical Navigation (VNAV) Vertical Guidance 7-3-4. Cold Temperature Airports (CTA) Table of Contents 7-3-1 7-3-1 7-3-1 7-3-2