| Author |
GPS Vs VOR approach
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| Erik Selde 2005-04-25, 8:57 pm |
| Hi all.
What´s the difference between a GPS and a VOR approach. I know how to
perform a VOR approach, but I´m not quite sure about the GPS approach
Thanks
| |
| Chris Harries 2005-04-25, 8:58 pm |
| VOR Approach..what are those I have only ever heard of ILS approaches
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"Erik Selde" <erik.selde@mail.dk> wrote in message
news:426cf1be$0$73747$edfadb0f@dread14.news.tele.dk...
quote:
> Hi all.
>
> What´s the difference between a GPS and a VOR approach. I know how to
> perform a VOR approach, but I´m not quite sure about the GPS approach
>
> Thanks
>
| |
|
| Erik, here are some examples of a non-precision (meaning lateral
guidance only) GPS approaches:
This is a "fresh" GPS approach. Note the nice T-shaped course from the
initial approach fix to the final approach fix:
http://www.myairplane.com/databases...fs/09225R28.PDF
This is an example of a GPS overlay approach, whereby the FAA took an
existing VOR approach and designated it a GPS approach as well:
http://www.myairplane.com/databases...s/00779VG14.PDF
Note that in this approach, there is only one initial approach fix, the
VOR itself: This is usually the limitation of a GPS overlay approach.
The pilot in this case is required to fly to the VOR, then turn
outbound, fly for a few miles to get established on the outbound
course, then execute a right procedure turn (turn right 45 degrees, fly
for a minute, then turn to the left 180 degrees, which puts the
aircraft on an intercept with the final approach course). That is a
lot more work and also, some additional GPS button pressing is required
to keep the GPS from sequencing the waypoints when flying outbound.
--
Peter
| |
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| "Chris Harries" <chrisflyer@blueyonder.co.uk> wrote in message
news:lfabe.150473$Nr5.123341@fe2.news.blueyonder.co.uk...
quote:
> VOR Approach..what are those I have only ever heard of ILS approaches
>
A non-precision approach. You have to look it up in the chart for the
runway in use and it gives you vectors and levels to fly using the VOR as a
datum to get you safely joined and onto the runway heading. The end bit is
always visual. A variation on the theme is the NDB approach. Study a chart
of a VOR/NDB approach and it will become self-explanatory.
Steve
| |
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| "Steve" <steve.deletemefirst@zord.co.uk> wrote in message
news:d4jq03$kgg$1@nwrdmz01.dmz.ncs.ea.ibs-infra.bt.com...
quote:
> "Chris Harries" <chrisflyer@blueyonder.co.uk> wrote in message
> news:lfabe.150473$Nr5.123341@fe2.news.blueyonder.co.uk...
>
> A non-precision approach. You have to look it up in the chart for the
> runway in use and it gives you vectors and levels to fly using the VOR as
a
quote:
> datum to get you safely joined and onto the runway heading. The end bit
is
quote:
> always visual. A variation on the theme is the NDB approach. Study a
chart
quote:
> of a VOR/NDB approach and it will become self-explanatory.
>
I should have added that if you're not visual by the time you get to
decision height (DH) and/or the MAP then you go Missed and follow the Missed
Approach instructions - again, all straightforward on the approach cheet.
Steve
| |
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| Steve wrote:
quote:
> You have to look it up in the chart for the
> runway in use and it gives you vectors and levels to fly using the
VOR as a
datum to get you safely joined and onto the runway heading.
Not always. See the description of VOR-A in my other post.
quote:
> The end bit is always visual.
The end bit of any approach including ILS CAT-I and CAT-II approaches
are always visual. AFAIK, CAT-III are the only approaches that don't
have to end visually.
--
Peter
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| Dallas 2005-04-26, 3:39 am |
|
"pr"
quote:
> http://www.myairplane.com/databases...s/00779VG14.PDF
> course, then execute a right procedure turn
Hey Peter, I noticed they don't give you a DME or intersection to initiate
the right turn. It's clearly around 8 nm but it looks like it's at the
pilot's discretion? Is that correct?
Dallas
| |
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| Dallas <Cybnorm@spam_me_not.Hotmail.Com> wrote:
quote:
> Hey Peter, I noticed they don't give you a DME or intersection to initiate
> the right turn. It's clearly around 8 nm but it looks like it's at the
> pilot's discretion? Is that correct?
See the 10nm ring? This is the "protected space" of the approach. The
turn must be completed within that 10nm ring. However, where the pilot
performs the turn within that 10nm is completely up to the pilot.
--
Peter
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| |
|
| I wrote:
quote:
> However, where the pilot
> performs the turn within that 10nm is completely up to the pilot.
As a point of clarification, the turn must be performed in the
*direction* depicted on the chart, but can be started anywhere along
the outbound course as long as it remains within the protected airspace
given on the chart.
For the approach referenced in this thread as an example, the turn is a
right turn off the outbound course and must be completed within 10nm of
the VOR.
--
Peter
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| Dallas 2005-04-27, 3:40 am |
|
"pr"
quote:
> For the approach referenced in this thread as an example, the turn is a
> right turn off the outbound course and must be completed within 10nm of
> the VOR.
Thanks as usual.
KDFW
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