Final answer:
Pressure altitude is the altitude in relation to a standard atmospheric pressure and is relevant to Army aviators for calculating aircraft performance and monitoring environmental conditions.
Step-by-step explanation:
Pressure altitude is defined as the altitude in relation to a standard atmospheric pressure, rather than the actual elevation above sea level. It is used by aviators to calculate aircraft performance and monitor environmental conditions.
As an Army aviator, pressure altitude is relevant because it helps determine engine performance, aircraft climb rates, and fuel consumption. By knowing the pressure altitude, pilots can make informed decisions about their flight plans and ensure safe operations.