Private Pilot Flight Training and Instruction Flight Training Article Library | Back To 4VFR.COM Illusions - Natural Illusions Rain Rain gives the illusion of being higher than you actually are. Combined with haze, you will fly lower approaches during rain. Visibility Low visibility can cause the illusion that things are further away. Entering a fog during descent will give an illusion of pitching up. Wind An updraft can cause such vertical sensation as to cause the pilot to put the nose of the aircraft down. He senses a climb where the attitude of the aircraft has been level. Avoid the weather conditions that can cause illusions. Believe your instruments. Get an instrument rating. Health Illness, medicine, alcohol, fatigue, or hypoxia will make susceptibility to an illusion more likely. It takes very little to cause disorientation Written by Gene Whitt Flight Training Article Library | Back To 4VFR.COM