What is ...
As the name implies,
ATC provides Horizontal + Vertical guidance
For Approach use only
~ 8 nm from T/D
Need to be in radar contact and have 2-way communication
ATC provides guidance by looking on a precise & fast updating radar screen
MOSTLY USED IN EMERGENCY SITUATIONS
PAR is available at civil and military airports
DH only upon request by the pilot
range/dist. Information from touch down is given about once ea. Mile
(ex: 5mi..., 4mi..., 3mi... from touchdown)
position updates/corrections are issued every couple of seconds or as required
missed approach instrument and communication failure will be issued
PAR usually has a 3 deg. Glide Path unless otherwise noted.
PAR usually consists of 2 radar units – one sweeps side to side & one that sweeps up and down → both sweep ~ once every second → almost no time delay
COMMON ATC STATEMENTS DURING
PAR - APPROACH
“coming up + on glide path” - for smaller planes
“on course/on glide path”
“going left of course/drifting → turn right …. (071)”
“going above/below glide path”
“slightly above glide path”
“going well above glide path”
PAR - Approach Profile
Differences between ...
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.
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.
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