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What is ...



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As the name implies,

the aircraft is only being monitored

and horizontal course guidance is provided

Need to be in radar contact and have

2-way communication,

ATC can see you

on a radar screen

  • A helpful approach in case of a VACUUM SYSTEM Failure!

  • ATC usually asks if the pilot wants a GYRO/NON-GYRO APPR

  • When flying an ASR Approach, the pilot is given radar vectors (headings)

to intercept and maintain the Final Approach Path.


  • The controller will advise the pilot of the applicable MDA and when to start

descent to it – READ BACKS by the pilot are NOT required.

(ON REQUEST, the controller issues Altitude Recommendations for each mile

during the Final Approach Path. These altitudes correspond/are derived from

a 3° Glide Slope equal to 300ft/nm descent.)


  • The pilot should report the airport or the ALS In-Sight, as soon as this should be the case. Otherwise the controller will advise the pilot to start the missed approach procedure.


  • At last, the pilot will also be advised of reaching the MAP



“turn left/right heading ...”


“slightly left of course– turn right – stop turn”


“slightly right course – turn left – stop turn”


“...miles from.. descent to MDA”


“...2 miles from RWY, slightly left/right - correcting”

Differences between ...


  • Horizontal guidance ONLY

  • pilot is advised when to start descent to MDA (MDA will also be announced)

  • pilot is advised when reaching MAP

  • ATC radar sweep 360 deg./6 sec.

  • (10 rpm) → radar pic updated every 6 sec.


  • Horizontal + Vertical guidance

  • comparabl to an ILS

  • controller radar screen shows detailed profile of horizontal & vertical (Glide Slope) position of the aircraft.

  • mostly used in Emergency situations

  • the pilot will constantly be advised how to fly/navigate.


During both approaches the Pilot is given position reports relative to the RWY
AND is issued missed approach instruction in case of  2-way radio failure

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