What does "final taxi" refer to in aviation?

In aviation, "final taxi" refers to the period when an aircraft is preparing to leave the tarmac for takeoff after completing all necessary checklists and procedures. This term is not typically used to describe just the starting of the second engine, although that is an important part of the pre-departure process.

The correct understanding of "final taxi" involves the sequence of events leading up to takeoff, wherein the aircraft usually taxis out to the runway after preparations have been made, including engine starts. Therefore, while engine startup is crucial, the concept of "final taxi" encompasses more than just starting the second engine; it signifies the operational readiness of the aircraft to move towards the runway for takeoff.

In contrast, the other options do not accurately capture the full meaning of "final taxi." Preparing for landing and reaching the final destination pertain to different flight phases, while the flight being ready for takeoff describes an earlier stage in the flight cycle. The specific reference to final taxi highlights the transitional phase directly before an aircraft departs the airport, rather than engine-specific actions or completion of flight.