The trajectory shall not come within how many feet of any overhead object?

The trajectory shall not come within how many feet of any overhead object?

• A. 25 feet
• B. 50 feet
• C. 75 feet
• D. 100 feet

Answer: (A)

Keep the flight path away from anything overhead to reduce the risk of contact with structures, trees, or other objects that could cause a fire or injury if the device arcs or falls short. The minimum clearance is twenty-five feet. This means the entire trajectory must stay at least twenty-five feet away from any overhead object—buildings, trees, power lines, scaffolding, etc.—for safe firing. In practice, you survey the firing site, identify any overhead obstacles, and only proceed if you can guarantee that the device’s arc will not approach within twenty-five feet of those objects. If you can’t maintain that clearance, you cannot fire the device. Distances larger than twenty-five feet are more conservative but not required by this rule, while smaller distances would be unsafe. Hence, twenty-five feet is the correct safety threshold.

Keep the flight path away from anything overhead to reduce the risk of contact with structures, trees, or other objects that could cause a fire or injury if the device arcs or falls short.

The minimum clearance is twenty-five feet. This means the entire trajectory must stay at least twenty-five feet away from any overhead object—buildings, trees, power lines, scaffolding, etc.—for safe firing.

In practice, you survey the firing site, identify any overhead obstacles, and only proceed if you can guarantee that the device’s arc will not approach within twenty-five feet of those objects. If you can’t maintain that clearance, you cannot fire the device.

Distances larger than twenty-five feet are more conservative but not required by this rule, while smaller distances would be unsafe. Hence, twenty-five feet is the correct safety threshold.