Which three features are considered "in the air" safety features?

The correct answer highlights features that enhance safety during flight operations. The "in the air" safety features are particularly focused on ensuring that the aircraft can safely operate and manage unexpected situations while airborne.

MASS, or the Mercenary Air Safety System, is a crucial component designed to monitor and enhance aircraft safety in various flight situations, providing alerts and safety measures to both pilots and ground crews. The late-arm switch is another important feature, ensuring that certain systems are only enabled at a safe time, preventing unintended activation that could compromise safety during critical phases of flight. The emergency stores jettison switch allows crew members to quickly release external stores (such as weapons or fuel tanks) in case of an emergency, thus preserving aircraft stability and ensuring a safe return.

These features collectively address in-flight safety by providing real-time monitoring, control, and the ability to mitigate dangerous situations quickly and effectively.