There are always ____ SOI days loaded on the AH-64E at any time.

• A. 1
• B. 2
• C. 3
• D. 4

Answer: (B)

The concept being tested is how the AH-64E manages preloaded data for Sensor/SoI (SOI) information. The system keeps a fixed, small window of SOI data loaded at all times to support near-term planning and quick access during flight.

Two days are kept loaded because you need immediate access to today’s SOI data and the next day’s as well. This setup allows the crew to plan and react without waiting for new data to be loaded, while avoiding unnecessary memory use or potential data staleness that could come with loading more days. One day wouldn’t give you a forward look, and more than two days isn’t needed given typical update cadences and memory constraints.

So, there are always two SOI days loaded on the AH-64E at any time.