Which system component is NOT part of the training as categorized in ACT II?

The thermal imaging sight (TIS) is not categorized as part of the training under ACT II because it is primarily considered an operational component rather than a training tool. The focus of ACT II training typically involves systems and equipment that are essential for configuring and managing the avenger systems in a training environment.

In this context, options like the Defense Advanced Global Positioning System Receiver (DAGR), Simple Key Loader (SKL), and Forward Area Control Terminal (FACTS) are all integral to the preparation and execution of training exercises. They contribute to the operational readiness and tactical proficiency required for the effective use of systems like the Avenger.

On the other hand, the TIS is designed for use in live operational scenarios, providing imagery and targeting capabilities for gunners during engagements rather than serving as a training aid. This distinction makes it clear why TIS does not fall under the categorized training components in ACT II.