For what purpose is the term "MRTW" used?

The term "MRTW" stands for Minimum Runway Takeoff Weight. This term is specifically used in aviation to identify the lowest weight at which an aircraft is able to safely take off from a specific runway.

Understanding the relevance of minimum runway takeoff weight is crucial for aviation safety and efficient flight operations. It incorporates various factors such as runway length, altitude, temperature, and aircraft configuration. By determining the MRTW, pilots and airline operations can ensure that the aircraft has sufficient performance capabilities to become airborne and complete a safe takeoff under the given conditions.

By contrast, the other options focus on different aspects of aviation metrics, such as thrust requirements and trajectory weights, which do not directly correlate with the concept of minimum runway takeoff weight.