In a trail formation of three size 3 aircraft, what is the distance from the center of the number one landing point to the center of the number three landing point?

• A. 50 meters
• B. 100 meters
• C. 150 meters
• D. 200 meters

Answer: (B)

In a trail formation, three aircraft are lined up with equal spacing along a straight line, so the distance from the first to the second is the same as from the second to the third. For size 3 aircraft, the standard center-to-center spacing is 50 meters. The distance from the center of the first landing point to the center of the third covers two such gaps—one from first to second and one from second to third. So 2 × 50 meters = 100 meters. Distances like 50 meters would only cover a single gap, while 150 or 200 meters would imply more gaps than exist in this three-aircraft trail.