Which of the following is NOT a factor on the IMSAFE checklist?

The IMSAFE checklist is a tool used by pilots to assess their fitness to fly. It stands for Illness, Medications, Stress, Alcohol, Fatigue, and Emotion. Each of these factors helps pilots evaluate their physical and mental readiness for flying.

The option related to weather conditions is not part of the IMSAFE checklist. While weather is indeed a critical consideration for flight safety, it falls under pre-flight planning and risk assessment, rather than pilot fitness. The other factors—Illness, Medications, and Fatigue—are directly related to the pilot’s personal health and readiness, making them integral components of the IMSAFE evaluation.