Final answer:
The question on required avoidance time for GA aircraft collision lacks sufficient context for a definitive answer. Pilots rely on training and equipment like TCAS to prevent such situations.
Step-by-step explanation:
The question appears to be asking about the required time to avoid a collision between two general aviation (GA) aircraft. The time depends on the relative speed and distance between the two aircraft. Typically, pilots need to maintain situational awareness and take action much before a potential collision is seconds away. However, this question does not provide enough information to determine an accurate answer. Typically, collision avoidance measures are taught in flight training and are part of a pilot's ongoing education. Pilots are trained to constantly scan for other aircraft and use equipment such as radar, transponders, and the Traffic Collision Avoidance System (TCAS) to prevent such situations from occurring.