In the ISS mode set to BOTH, what occurs if either pilot pulls their ejection handle?

When the ISS (Intercom Switching System) mode is set to BOTH, this configuration allows for a coordinated ejection of both pilots in the aircraft. The system is designed to enhance safety and ensure that in the event of an emergency where one pilot pulls their ejection handle, it triggers the ejection sequence for both pilots. This mechanism is crucial during high-stress situations where a quick and simultaneous ejection is necessary for the safety of both crew members, thereby maximizing the chances of survival.

The rationale behind such a setup emphasizes the importance of mutual support and coordination between pilots, particularly in scenarios where separation may be hazardous or when both pilots are under similar threat levels. This feature eliminates the risk of one pilot remaining in the cockpit while the other ejects, which could lead to complicated and potentially dangerous situations.