Which of the following is not a valid method for marking MEDEVAC pickup site?

• A. Panels
• B. Smoke Signal
• C. None
• D. Pyrotechnic Signal

Answer: (C)

Marking a MEDEVAC pickup site relies on signals that are clearly visible from the air, so any method that achieves quick, unambiguous identification is considered valid. Ground panels provide large, high-contrast markings on open terrain that guide aircraft directly to the location. Colored smoke signals offer a rapid visual indicator that can be spotted from distance in daylight and can be tailored to stand out against the surroundings. Pyrotechnic signals, such as flares, give bright, short-duration markers that are especially useful at night or in poor visibility, helping pilots locate the site quickly.

Since all of these methods are established and effective ways to mark a MEDEVAC pickup site, there isn’t an invalid method among the options. None is the correct choice because every listed method can be used to signal a MEDEVAC location.