If the break point is straight through, when should you turn crosswind?

The correct choice indicates that you should turn crosswind at the departure end of the runway when the break point is straight through. This action is based on standard traffic patterns and flight procedures for maintaining safe and orderly operations.

Turning crosswind at the departure end allows the aircraft to efficiently transition to the next phase of the landing pattern while ensuring adequate separation from other traffic and maintaining a safe distance from the runway. This timing is critical because it minimizes the likelihood of conflicts with other aircraft that may be departing or arriving on the runway.

In other contexts, turning at the midpoint of the aircraft's speed or at a specific indicated airspeed like 140 KIAS may not adequately consider the safe operational practices regarding terrain, traffic, and necessary separation. Additionally, turning only upon receiving clearance from the RSU could lead to delays or conflicts with traffic if other factors are not properly assessed in the moment. Therefore, initiating the turn at the departure end aligns with established practices to ensure safety and efficiency during flight operations.