In the slingload reference light arrangement, what is the distance between each of the three lights?

• A. 5 meters
• B. 10 meters
• C. 15 meters
• D. 20 meters

Answer: (A)

Visual reference lighting uses three lights arranged in a line to give pilots a stable visual cue for distance and alignment during sling load operations, especially at night or in low visibility. The standard spacing is five meters between each light. This creates two equal gaps, making a total span of ten meters from the first to the last light, which is just large enough to be easily perceived in the cockpit under rotor wash while staying compact enough to avoid snagging or clutter. The consistent 5-meter spacing lets the pilot count the intervals to judge how far the load is from the helicopter or from the reference point, helping maintain proper centerline alignment and safe clearance in the landing zone.