Per military planes, I suspect they select the preferred behavior ahead of time based on the mission and estimated flight path. In some cases self-destruct may

Per military planes, I suspect they select the preferred behavior ahead of time based on the mission and estimated flight path. In some cases self-destruct may be the better option, in others, a controlled landing is better. You probably don't want to self-destruct over your own cities and thus build in logic to find a rural landing spot if it's a local or training mission.