FH.VII.C.R2

From the FAA library

• Aeronautical Information Manualp. 4-3-22
  Chapter 4. Air Traffic Control › Section 3. Airport Operations › 4-3-16. VFR Flights in Terminal Areas

  miles is not prohibited, but good judgment would dictate that you keep out of the approach area. b. Reduced Visibility. It has always been recognized that precipitation reduces forward visibility. Consequently, although again it may be perfectly legal to cancel…

• Aeronautical Information Manualp. 10-2-15
  Chapter 10. Helicopter Operations › Section 2. Special Operations › 10-2-3. Landing Zone Safety

  streaks 41-47 Strong Gale High waves (20 ft.), sea begins to roll, dense streaks of foam, spray may reduce visibility 48-55 Storm Very high waves (20-30 ft.) with overhanging crests, sea white with densely blown foam, heavy ... uprooted, “considerable structural damage” 56-63 Violent Storm Exceptionally high (30-45 ft.) waves, foam patches cover sea, visibility more reduced 64+ Hurricane Air filled with foam, waves over 45 ft., sea completely white with driving spray, visibility greatly reduced…

• Aeronautical Information Manualp. 7-6-16
  Chapter 7. Safety of Flight › Section 6. Potential Flight Hazards › 7-6-16. Avoid Flight in the Vicinity of Exhaust Plumes (Smoke Stacks and Cooling Towers)

  Exhaust Plumes (Smoke Stacks and Cooling Towers) a. Flight Hazards Exist Around Exhaust Plumes. Exhaust plumes are defined as visible or invisible emissions from power plants, industrial production facilities, or other industrial systems that release large amounts of vertically directed ... disturbances such as turbulence and vertical shear. Other identified potential hazards include, but are not necessarily limited to: reduced visibility, oxygen depletion, engine particulate contamination, exposure to gaseous oxides, and/or icing. Results of encountering a plume may include airframe damage…

• Aeronautical Information Manualp. 7-1-44
  Chapter 7. Safety of Flight › Section 1. Meteorology › 7-1-16. Estimating Intensity of Rain and Ice Pellets

  completely cover an exposed surface regardless of duration. Visibility is not affected. 2. Moderate. Slow accumulation on ground. Visibility reduced by ice pellets to less than 7 statute miles. 3. Heavy. Rapid accumulation on ground. Visibility reduced by ice pellets…

• Aeronautical Information Manualp. 10-1-2
  Chapter 10. Helicopter Operations › Section 1. Helicopter IFR Operations › 10-1-2. Helicopter Instrument Approaches

  Approaches a. Instrument flight procedures (IFPs) permit helicopter operations to heliports and runways during periods of low ceilings and reduced visibility (e.g. approach/SID/STAR/en route). IFPs can be designed for both public and private heliports using FAA instrument criteria…

• Helicopter Flying Handbookp. 8-3
  Chapter 8: Ground Procedures and Flight Preparations › Engine Start and Rotor Engagement › Rotor Safety Considerations

  injury to nearby people and damage to buildings, automobiles, and other aircraft. Loose snow, sand, or soil can severely reduce visibility and obscure outside visual references. There is also the possibility of sand and snow being ingested into the engine…