What does the acronym EFIS stand for?

The acronym EFIS stands for Enhanced Flight Information System. This term refers to a modern flight display system used in aviation that integrates various vital flight information within a cockpit interface. The enhanced nature of this system means it typically provides pilots with more comprehensive situational awareness through digital displays that may include data on navigation, aircraft systems, weather, and more.

An Enhanced Flight Information System is designed to improve the efficiency and effectiveness of pilots in managing flight operations, making it easier to interpret complex data quickly and accurately. By consolidating multiple indicators and instruments into a single or integrated display, it supports better decision-making and enhances overall flight safety.

The other options do not accurately reflect the widely recognized meaning of EFIS within the aviation industry, which further solidifies why "Enhanced Flight Information System" is the correct interpretation of the acronym.