What should number 2 do if he experiences spatial disorientation?

When number 2 experiences spatial disorientation, the most appropriate action is to inform number 1. Communication is critical in formation flying, especially in situations where one pilot may be losing situational awareness. By alerting number 1, the lead can take appropriate measures to assist, such as adjusting their flight path or altitude to help regain spatial orientation.

Spatial disorientation can lead to loss of control and dangerous flight conditions. Thus, by informing number 1, number 2 not only prioritizes safety but also enables coordinated actions within the formation. In formation flying, reliance on visual cues and mutual support among pilots is essential. Therefore, maintaining open lines of communication is a fundamental aspect of safe flying operations.

Other options might seem appealing but do not effectively address the situation. Descending immediately may not be safe or necessary and could lead to complications in formation. Performing a barrel roll is a risky maneuver that could exacerbate the situation rather than resolve it. Contacting ground control for advice does not provide immediate support or solutions to the disorientation being experienced in-flight.