What is the diameter of TDP Size 5 used for specific helicopter operations?

The diameter of a TDP (Touchdown Point) Size 5 is specified as 100 meters. This size is designated for helicopters that require larger landing zones due to their operational needs, such as heavier aircraft or those involving specific mission profiles. A TDP of this size allows for adequate clearance and safety margins around the helicopter as it lands and takes off, which is essential for preventing any potential mishaps.

The standardization of TDP sizes ensures that pilots and ground crews have a clear understanding of space requirements for various helicopter types, enhancing operational efficiency and safety. Specifically, Size 5 accommodates helicopters that may have larger rotor diameters or require additional space due to load considerations or environmental factors, emphasizing the importance of proper landing zone planning.