A Guide for Private-Airplane Passengers Your pilot may be a good friend, a nice person, your spouse, or a close relative, but can you tell if he or she is being a safe pilot? In Private-Airplane Passenger Safety, Master Pilot John O. Graybill identifies what every passenger needs to know in easy-to-understand, non-technical language that could save your life. Graybill's simple red-flag and yellow-flag system calls out common pilot actions to help you evaluate and recognize the subtle, little-noticed behaviors and attitudes of pilots that, gone unnoticed, could lead to dangerous problems! Learn to quickly and easily identify unsafe behaviors of your pilot and know if your pilot is being as safe as possible. Flying is fun, there's no need to fear the unknown. Arm yourself with knowledge and enjoy the skies.