An instrument landing system (ILS) uses two separate ground-based radio transmitters to provide both lateral and vertical guidance to pilots during an instrument approach procedure that normally ...

The FAA's Minimum Operational Network (MON) designates airports that provide at least one instrument approach flyable without GPS or DME, serving as a critical backup during GPS outages as the VOR ...

Does that APR, or approach mode key, on your autopilot somehow activate a GPS receiver so it can fly an approach? The answer is no, it doesn't. And if you're confused about that, you're not alone. And ...