What occurs if the ISS is set to SOLO?

When the ISS (Integrade Survival System) is set to SOLO, it indicates that the ejection system will initiate the ejection sequence for each seat independently. This means that if the rear seat is to be ejected, it can do so without waiting for the front seat to eject, and vice versa. The system is designed this way to provide enhanced safety and flexibility during an emergency ejection scenario, allowing each seat to follow its own ejection protocol based on the situation, ultimately improving the chances of survival for both pilots.

In contrast, for the other options, configuration settings that dictate the order or simultaneous action of seat ejection differ. The rear seat ejecting only after the front seat or both seats ejecting together suggests a different operational mode which does not apply when the ISS is set to SOLO. The option that states only the rear seat can be ejected misrepresents the functionality of the ISS, as both seats have independent control and could be ejected based on pilot requirements in an emergency.