At what point will the header tank warning appear in the HDD warning area?

The correct answer regarding when the header tank warning appears in the HDD warning area is at 179 lbs remaining. The header tank is a critical component of the MQ-9 systems, and the warning mechanism is designed to alert the operator when the fuel level in this tank becomes critically low.

Setting the threshold at 179 lbs ensures that the crew has adequate time to respond to the fuel situation, preventing possible operational issues related to fuel management. This early warning is vital for maintaining mission integrity and safety.

Understanding the specific fuel thresholds is essential for effective mission planning and execution, as it affects not just fuel management but also overall aircraft performance and mission success.