UA.III.B.K1i

From the FAA library

• Pilot's Handbook of Aeronautical Knowledgep. 12-15
  Chapter 12: Weather Theory › Atmospheric Stability › Fog

  this point, water vapor in the air condenses and becomes visible in the form of fog. Fog is classified according to the manner in which it forms and is dependent upon the current temperature and the amount of water vapor ... clear nights, with relatively little to no wind present, radiation fog may develop. [Figure 12-21] Usually, it forms in low-lying areas like mountain valleys. This type of fog occurs when the ground cools rapidly due to terrestrial radiation…

• Pilot's Handbook of Aeronautical Knowledgep. 12-15
  Chapter 12: Weather Theory › Atmospheric Stability › Clouds

  This type of fog also requires wind for formation and continued existence. Upslope and advection fog, unlike radiation fog, may not burn off with the morning sun but instead can persist for days. They can also extend to greater heights ... than radiation fog. Steam fog, or sea smoke, forms when cold, dry air moves over warm water. As the water evaporates, it rises and resembles smoke. This type of fog is common over bodies of water during the coldest times…

• Remote Pilot - Small Unmanned Aircraft Systems Study Guidep. 24
  Chapter 3b: Effects of Weather on Small Unmanned Aircraft Performance › Temperature/Dew Point Relationship › Methods by Which Air Reaches the Saturation Point

  trapped below. If the relative humidity of the air is high, it can contribute to the formation of clouds, fog, haze, or smoke resulting in diminished visibility in the inversion layer. Surface-based temperature inversions occur on clear, cool nights ... point, the air is completely saturated and moisture begins to condense out of the air in the form of fog, dew, frost, clouds, rain, or snow. Methods by Which Air Reaches the Saturation Point If air reaches the saturation point…

• Pilot's Handbook of Aeronautical Knowledgep. 12-15
  Chapter 12: Weather Theory › Atmospheric Stability › Dew and Frost

  ability to take off. An aircraft must be thoroughly cleaned and free of frost prior to beginning a flight. Fog Fog is a cloud that is on the surface. It typically occurs when the temperature of air near the ground ... point. At this point, water vapor in the air condenses and becomes visible in the form of fog. Fog is classified according to the manner in which it forms and is dependent upon the current temperature and the amount…

• Aeronautical Information Manualp. PCG C-5
  Pilot/Controller Glossary › C

  minute water droplets and/or ice particles in the atmosphere above the Earth’s surface. Cloud differs from ground fog, fog, or ice fog only in that the latter are, by definition, in contact with the Earth’s surface…

• Pilot's Handbook of Aeronautical Knowledgep. 7-36
  Chapter 7: Aircraft Systems › Pressurized Aircraft

  explosive decompression, there may be noise, and one may feel dazed for a moment. The cabin air fills with fog, dust, or flying debris. Fog occurs due to the rapid drop in temperature and the change of relative humidity. Normally…