What should you do if a controlled ejection is required without intercom communication?

Using the face curtain signal is the correct response when a controlled ejection is needed without intercom communication. The face curtain signal is a non-verbal communication method that allows crew members to signal each other in the absence of verbal communication systems. This method is particularly critical in emergency situations where clear and immediate understanding between crew members is essential for coordinating their actions effectively.

The other options do not provide an effective solution for the specific scenario of needing to perform a controlled ejection without intercom communication. Performing emergency landing procedures might be relevant in a scenario involving aircraft safety, but it does not address the need for immediate communication between crew members during an ejection. Resetting navigational systems would focus on navigation issues rather than addressing the urgent need for coordinated action in an emergency ejection situation. Signaling via radio to maintain communication could be useful in some contexts, but it may not guarantee that all crew members receive or understand the message in a high-pressure, time-sensitive situation like a controlled ejection. Therefore, relying on the face curtain signal becomes the most effective and immediate means of communication among crew members in this critical scenario.