When should a go-around be executed?

Executing a go-around is a critical maneuver that pilots should perform when the approach becomes unstable. An unstable approach may indicate that the aircraft is not aligned properly with the runway, is at an incorrect speed, or has not achieved the necessary altitude. Continuing an unstable approach can lead to a higher risk of landing accidents, so it's essential to prioritize safety and initiate a go-around in such situations.

This action allows pilots to reassess their approach and ensure they have the correct configuration and dynamics to safely land the aircraft. By choosing to go around, the pilot can regain proper control of the aircraft and safely complete another approach when conditions are more favorable.

In contrast, being cleared by ATC, encountering poor weather conditions, or being on final approach, while significant in their own rights, do not necessarily mandate a go-around. Clearance from ATC is important for traffic implications but does not relate directly to the stability of the approach itself. Similarly, poor weather can affect decision-making but does not automatically require a go-around unless it directly leads to an unstable approach. Thus, the best option for ensuring safety during landing is to execute a go-around when the approach is deemed unstable.