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ASR Approaches

Before the advent of GPS approaches, most civilian approach control facilities provided Airport Surveillance Radar (ASR) approaches, usually as a back-up to pilot-nav approaches. Many are now gone but some airports still have them. In Florida, only two civilian airports have ASR approaches: Key West and Tallahassee, at opposite ends of the state. However, there are seven military airports with ASR approaches.

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Key Takeaways:

  • ASR (Airport Surveillance Radar) approaches are ground-controlled, non-precision approaches providing only lateral guidance and suggested altitudes, and are now rare in civilian aviation but still found at some military and international airports (known as SRE/SRA).
  • Flying an ASR approach requires only a two-way radio and heavy reliance on controller instructions for vectors, altitudes, and missed approach points, making it labor-intensive for ATC.
  • Unlike Precision Approach Radar (PAR) which provides vertical guidance, ASR approaches' lack of a glideslope results in higher minimums and demands precise pilot-controller communication, as tragically illustrated by the National Airlines Flight 193 accident.
  • Pilots interested in experiencing an ASR approach are encouraged to contact the controlling agency in advance to schedule a practice approach, as their availability is limited and familiarity among instructors may be low.
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Before the advent of GPS approaches, most civilian approach control facilities provided Airport Surveillance Radar (ASR) approaches, usually as a back-up to pilot-nav approaches. Many are now gone but some airports still have them. In Florida, only two civilian airports have ASR approaches: Key West and Tallahassee, at opposite ends of the state. However, there are seven military airports with ASR approaches.

If you are lucky enough to have an ASR approach near by and have never flown one, consider trying it during the next IPC or on your own with a safety pilot. There are two issues to consider. Because of the current lack of ASR approaches, many CFIIs are not familiar with them, but the good news is that the controllers will provide the information to fly the approach. Also, because the approach is labor intensive, it is best to call the controlling approach control facility to find out when they might be able to provide a practice ASR approach. However, don’t be surprised if you get a time very early in the morning or late at night when traffic is low. Do keep in mind that controllers need to practice the approaches for currency purposes, so they’ll probably try to be as accommodating as traffic will allow.

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