Final answer:
Establish control facilities is not specifically the third step in establishing a Helicopter Landing Zone. The procedures can vary by military unit and operation, emphasizing site selection, site preparation and securing, and establishing communications.
Step-by-step explanation:
The statement that 'Establish Control Facilities is the third step when establishing a Helicopter Landing Zone (HLZ)' is false. When establishing a Helicopter Landing Zone, there is a general sequence of steps to follow, but 'establish control facilities' is not specifically the third step. The basic steps generally include selecting the site, conducting a map study and reconnaissance, marking the site, controlling and securing the area, establishing communications, and briefing all personnel involved. These steps can vary based on the specific procedures of a military unit or operation, and it's essential to follow the guidelines and procedures specific to the mission at hand.