What is the CDI scaling for Terminal navigation?

The correct answer is based on the standard scaling of the Course Deviation Indicator (CDI) for terminal navigation, which is typically set to ±1 nautical mile (NM). This scaling allows pilots to accurately monitor their lateral position relative to the desired course in environments where the aircraft is operating close to the ground, such as during approach and landing phases.

Having a more precise CDI scaling of ±1 NM in terminal environments is crucial as it helps pilots make finer adjustments to their flight path. This precision aids in the safe and efficient navigation of the aircraft within busy airspaces or during low visibility conditions typically encountered in terminal areas.

Understanding the correct CDI scaling is vital for maintaining situational awareness and ensuring compliance with approach procedures. In contrast, other scaling options, like ±2 NM, ±5 NM, and ±0.3 NM, represent different operational contexts or types of navigation where the level of precision may vary accordingly, but they do not align with the terminal navigation standard.