What does TDP stand for?

• A. Touch down point
• B. Takeoff deployment point
• C. Target designation point
• D. Terrain datum point

Answer: (A)

TDP stands for the touchdown point—the designated spot in the landing zone where the helicopter is expected to touch down. This point is defined during LZ planning and serves as the reference for the pilot’s approach and the ground guide, helping ensure a safe, stable landing with proper rotor wash clearance and obstacle avoidance. The other terms refer to concepts outside the landing process: a point related to taking off, a target-marking point, or a terrain reference used for mapping, none of which describe where the aircraft actually lands in an LZ/PZ.