What is the specified rule regarding proximity to aircraft when engines are operating or starting?

• A. No vehicle will be parked or driven closer than 50 ft in front of or 200 ft to the rear
• B. No vehicle will be parked or driven closer than 25 ft in front of or 150 ft to the rear
• C. No vehicle will be parked or driven closer than 10 ft in front of or 100 ft to the rear
• D. No vehicle will be parked or driven closer than 25 ft in front of or 200 ft to the rear

Answer: (D)

The rule focuses on staying clear of aircraft engines to avoid two hazards: being drawn into an operating or starting engine from the front and being hit by powerful jet blast from the rear. The mandated safe distances are 25 feet in front of the aircraft and 200 feet behind it. Keeping this front clearance protects you from the intake area, and the rear clearance shields you from the strong exhaust. Other distances shown would place you too close to either the intake or the jet blast and are not the required rule.