How will number 1 initiate gear and flap calls in IMC?

In Instrument Meteorological Conditions (IMC), communication between formation members is crucial, particularly when visual cues are limited or non-existent. Number 1 will initiate gear and flap calls by using radio communication. This method ensures that all members of the formation receive the call simultaneously, regardless of their visual line of sight to the lead aircraft.

Radio calls are standard practice in IMC to avoid confusion and ensure clear communication. The use of checklists or visual signals is not as effective under these conditions, as pilots may not be able to see each other or have immediate access to their checklists. The intercom system is typically used for intra-cockpit communication rather than for formation-wide calls, making radio the most reliable and standard method for initiating such calls in IMC.