What is the line spacing for number 2 in route formation?

In route formation, the correct line spacing for number 2 is 30 degrees aft of the lead aircraft's line-of-flight vector (LAB) up to LAB. This position allows number 2 to maintain a clear line of sight to the lead while keeping a safe distance that promotes effective situational awareness and helps to avoid overlap between aircraft.

Positioning at 30 degrees aft of LAB allows for optimal spacing that takes advantage of the aircraft's performance characteristics, allowing for coordinated turns and movements without risking a loss of control or safe distance between aircraft. This configuration also provides sufficient visual reference to the lead aircraft while ensuring that both aircraft can communicate effectively, which is crucial for safety and mission success in a formation flying context.

Using this specific spacing supports the tactical flexibility necessary for formation operations and enables the wingman to react appropriately to any movements made by the lead aircraft. While other options may suggest positions that could hinder visibility or lead to unsafe distances, the selected answer promotes both safety and effective teamwork in the formation.