How far past the point should departure leg/takeoff ejections occur?

Departure leg and takeoff ejections should occur past the point where you can land straight ahead. This guideline is critical for ensuring safety during takeoff, as it allows the pilot to effectively manage an emergency situation without having to attempt a potentially dangerous turn back towards the runway.

The reasoning for this is that by waiting until you are beyond the point you can land straight ahead, you ensure that your aircraft is at a safe distance from obstacles and other potential hazards that can exist in the airspace and on the ground. It also gives you adequate altitude and maneuverability options to make safe decisions in critical moments after engine failure or other emergencies.

In contrast, the other options relate to points on the runway or in the traffic pattern that do not adequately ensure the safety of the aircraft in the event of a malfunction shortly after takeoff. For example, turning back at the point you can turn back may lead to serious mishaps because it might not allow sufficient altitude or control over the aircraft. Similarly, referencing the runway threshold or traffic pattern altitude is not relevant to the immediate decision-making required once a takeoff is initiated. Instead, it emphasizes the importance of making sure the aircraft has sufficient options and safety margins before facing potential hazards.