When should number 2 move into the stack level position on a formation approach?

Moving number 2 into the stack level position on a formation approach is crucial for maintaining formation integrity and ensuring safety during the landing process. The correct guideline is that number 2 should transition to this position no later than half a mile from the runway or upon obtaining Visual Meteorological Conditions (VMC).

This timing is important because it allows number 2 to establish a safe and effective position in relation to number 1, ensuring that both aircraft are appropriately spaced and configured for landing. At this point, number 2 can effectively monitor number 1's actions and make necessary adjustments to maintain formation while preparing for the landing roll.

Establishing this position too late can lead to difficulties in managing spacing and may cause challenges in the event of a go-around procedure. By adhering to this guideline, number 2 ensures that they are properly aligned and ready for the final approach, while also allowing sufficient time to respond to any potential issues that may arise as they near the runway.