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

The header tank caution appears in the HDD warning area when the fuel level in the header tank reaches 194 pounds remaining. This indication serves as a critical alert to the operator that the fuel is getting low in the header tank, which is essential for the propulsion system and overall flight operations of the MQ-9. The caution allows operators to take necessary actions to ensure safe operations, such as planning for refueling or evaluating the current mission’s feasibility.

Understanding this threshold is important for flight safety and mission planning, as the header tank directly influences the ability to maintain power and control during flight. The other fuel levels listed do not trigger the caution alert, which is vital for effective fuel management and operational awareness during missions.