Airport

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Surveillance

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Radar

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

COMMON ATC STATEMENTS DURING AN

ASR-APPROACH

“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 ...

ASR

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.

PAR

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