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What is the maximum allowable blood alcohol level for operating a small UAS?

  1. 0.08

  2. 0.06

  3. 0.04

  4. 0.02

The correct answer is: 0.04

The maximum allowable blood alcohol content (BAC) for operating a small Unmanned Aircraft System (UAS) is 0.04%. This standard aligns with the regulations set forth by the Federal Aviation Administration (FAA), which stipulates that remote pilots must not operate a UAS if their BAC is at or above this threshold. Maintaining a BAC below 0.04% is crucial for ensuring safe operation, as alcohol can impair judgment, coordination, and reaction time, which are essential for piloting. Pilots are encouraged to manage their alcohol consumption responsibly, especially before flights, to comply with regulatory standards and contribute to overall aviation safety. The other levels listed would exceed the legal limit for UAS operations and could lead to serious safety risks and legal ramifications for pilots.