Section 3. Wake Turbulence 7-3-1. General 7-3-2. Vortex Generation 7-3-3. Vortex Strength . 7-3-4. Vortex Behavior . 7-3-5. Operations Problem Areas 7-3-6. Vortex Avoidance Procedures . 7-3-7. Helicopters . 7-3-8. Pilot Responsibility 7-3-9. Air Traffic Wake Turbulence Separations 7-3-10. Development and New Capabilities . 7-3-1 7-3-1 7-3-1 7-3-2 7-3-4 7-3-5 7-3-6 7-3-6 7-3-7 7-3-8 Section 4. Bird Hazards and Flight Over National Refuges, Parks, and Forests Migratory Bird Activity Reducing Bird Strike Risks . Reporting Bird Strikes . Reporting Bird and Other Wildlife Activities Pilot Advisories on Bird and Other Wildlife Hazards Flights Over Charted U.S. Wildlife Refuges, Parks, and Forest Service Areas . 7-4-1 7-4-1 7-4-1 7-4-1 7-4-2 7-4-2 Section 5. Potential Flight Hazards 7-5-1. Accident Cause Factors 7-5-2. VFR in Congested Areas . 7-5-3. Obstructions To Flight . 7-5-4. Avoid Flight Beneath Unmanned Balloons 7-5-5. Unmanned Aircraft Systems 7-5-6. Mountain Flying 7-5-7. Use of Runway Half-way Signs at Unimproved Airports 7-5-8. Seaplane Safety . 7-5-9. Flight Operations in Volcanic Ash . 7-5-10. Emergency Airborne Inspection of Other Aircraft . 7-5-11. Precipitation Static . 7-5-12. Light Amplification by Stimulated Emission of Radiation (Laser) Operations and Reporting Illumination of Aircraft 7-5-13. Flying in Flat Light, Brown Out Conditions, and White Out Conditions 7-5-14. Operations in Ground Icing Conditions 7-5-15. Avoid Flight in the Vicinity of Exhaust Plumes (Smoke Stacks and Cooling Towers) 7-5-1 7-5-1 7-5-1 7-5-2 7-5-2 7-5-3 7-5-5 7-5-6 7-5-7 7-5-8 7-5-9 7-5-10 7-5-11 7-5-13 7-5-14 Section 6. Safety, Accident, and Hazard Reports Aviation Safety Reporting Program Aircraft Accident and Incident Reporting . Near Midair Collision Reporting Unidentified Flying Object (UFO) Reports Safety Alerts For Operators (SAFO) and Information For Operators (InFO) . 7-6-1 7-6-1 7-6-2 7-6-3 7-6-3 Table of Contents