When will number 2 respond to a frequency change directive?

The correct response to when number 2 should respond to a frequency change directive is when they hear "go channel xx." In formation flying, clear communication between pilots is crucial for maintaining safety and coordination. When the lead pilot issues a directive to change frequencies, it's an explicit command that number 2 is trained to follow immediately. This ensures that the entire formation can stay synchronized, allowing for effective communication and coordination as they maneuver.

Choosing to switch frequencies only when feeling ready or waiting for confirmation with lead undermines the efficiency of the formation and could lead to communication gaps during critical moments. Additionally, responding to frequency changes only when lead is in trouble does not reflect the proactive communication and teamwork necessary in formation flying. The success of formation operations relies heavily on understanding and trusting directives as promptly as they are given.