When executing Lost Wingman procedures, what is the first step for number 2 when number 1 is lost in IMC?

In Lost Wingman procedures, when number 1 is lost in Instrument Meteorological Conditions (IMC), the first crucial step for number 2 is to transition to instruments. This is vital because IMC implies that visual contact with number 1 is impossible due to poor visibility, and maintaining orientation solely through visual references is unsafe.

Transitioning to instruments allows number 2 to establish a reliable spatial orientation using the aircraft's instruments, ensuring safety and proper control in the challenging flying conditions. Once this step is taken, number 2 can then focus on resolving the lost wingman situation by executing the appropriate follow-on steps, such as notifying air traffic control or considering a safe maneuver to re-establish position. This systematic approach is key in maintaining safety until visual conditions improve or they can regain situational awareness.