Final answer:
Full-scale deflection for VOR is typically ± 10 degrees, while for ILS localizer it is ± 2.5 degrees. These are maximum deviations on the CDI used to indicate an off-course situation for an aircraft navigating using these systems.
Step-by-step explanation:
The question asked relates to the Instrument Landing System (ILS) and the VHF Omnidirectional Range (VOR) navigation aids used in aviation. Full-scale deflection for these systems represents the maximum deviation indicated on the Course Deviation Indicator (CDI) before a pilot would be considered off-course.
For VOR navigation, full-scale deflection is typically ± 10 degrees from the selected course. This means that the CDI needle will have deflected to its maximum position when the aircraft is 10 degrees off the intended course. For an ILS localizer, the full-scale deflection is much more sensitive, as it is typically ± 2.5 degrees. This increased sensitivity is required for the precise approach paths necessary during landings.
These indicators are crucial for pilots to maintain their intended flight paths and to execute accurate approaches, especially in poor visibility conditions. Understanding the full-scale deflection of these systems helps in maintaining situational awareness and ensuring flight safety.