What are the three EFIS modes?

The three EFIS (Electronic Flight Instrument System) modes are enroute, approach, and composite mode.

In the enroute mode, the system provides navigational data along with a comprehensive view of the aircraft’s position relative to waypoints and airways, which is essential for planning and executing a flight path. The approach mode is specifically tailored for use during the final stages of flight when the aircraft is preparing for landing. In this mode, the display focuses on critical information such as glide slope, localizer, and other approach details to facilitate a safe landing. Composite mode combines elements from both the enroute and approach phases, allowing pilots to view relevant information from both modes simultaneously. This flexibility can be particularly useful in transitioning from enroute to approach.

The other options contain combinations of modes that do not accurately reflect the primary classifications recognized in the EFIS. For example, while "landing" may be a phase of flight, it is not classified as a standard EFIS mode like "composite."