>[!abstract] >IMSAFE is a mnemonic for aircraft pilots to use to assess their fitness to fly: >- **Illness** — Is the pilot suffering from any illness or symptom of an illness which might affect them in flight? >- **Medication** — Is the pilot currently taking any drugs (prescription or over-the-counter)? >- **Stress** — Is the pilot overly worried about other factors in their life? The psychological pressures of everyday living on pilot fatigue can be a powerful distraction and consequently affect a pilot's performance. >- **Alcohol** — Although legal limits vary by jurisdiction (0.04 BAC, any consumption in the past 8 hours or current impairment in the USA), the pilot should consider their alcohol consumption within the last 8 to 24 hours. >- **Fatigue** — Has the pilot had sufficient sleep and adequate nutrition? >- **Emotion** — Has the pilot fully recovered from any extremely upsetting events such as the loss of a family member? (Wikipedia, 2025). >[!related] >- **North** (upstream): — >- **West** (similar): [[PAVE checklist]], [[SHELL model]] >- **East** (different): — >- **South** (downstream): —