What are the two key nighttime marking patterns for the FIRST AC TO LAND?

• A. Inverted Y and NATO T
• B. Inverted L and diagonal X
• C. Circular beacon and square array
• D. Single directional beam and cross pattern

Answer: (A)

Nighttime LZ/PZ operations rely on clear, easily recognizable ground cues to guide the first aircraft to a safe landing. The two patterns used for the first aircraft are the inverted Y and the NATO T. The inverted Y creates a distinct, stable outline that helps the pilot identify the landing zone boundaries and the approach corridor, signaling where the center of the LZ lies. The NATO T marks the touchdown area and aligns the aircraft with the intended landing axis, giving the pilot a reliable reference for where to touch down and how to proceed for subsequent arrivals. Together, these shapes are chosen because they are high-contrast and rapidly recognizable at night, even with limited visibility or lighting, reducing the risk of misalignment or collision as the first helicopter settles in.

Other options don’t fit because they aren’t standard night-signaling patterns for the first landing. They either describe lighting elements (like a beacon) rather than ground pattern cues, or propose shapes that aren’t used to guide the initial approach and touchdown with the same clarity and reliability.