Which condition indicates a need to execute a go-around?

A go-around is a procedure that pilots execute when it's unsafe to land the aircraft. The indication for this action is frequently derived from the state of the approach.

An unstable approach is particularly critical in determining the need for a go-around. This condition suggests that the aircraft is not in a proper configuration or position to land safely; it may involve issues such as excessive rate of descent, improper heading, or being at the wrong airspeed. When the approach is unstable, landing could result in accidents, making the go-around necessary to ensure safety.

The other conditions mentioned do not indicate a need for a go-around. Maintaining visual reference throughout the approach indicates a successful and safe flight profile leading to landing, while a clear trajectory down the final approach suggests everything is going as planned for landing. Therefore, these conditions typically mean that a go-around is not needed. The focus on the unstable approach as the primary trigger for a go-around underscores the importance of ensuring a safe landing configuration before touchdown.