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#1
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WAAS GPS approach question.
Hello,
I read on the Garmin page that their 480 is Waas certified...so that you can fly precision approaches without an ILS... what does this mean exactly? If I'm coming into an airport with only an NDB approach, can I use the 480's capabilites to fly a precision approach and get down to a lower MDA/DH? -dr |
#2
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WAAS GPS approach question.
Hello,
I read on the Garmin page that their 480 is Waas certified...so that you can fly precision approaches without an ILS... what does this mean exactly? If I'm coming into an airport with only an NDB approach, can I use the 480's capabilites to fly a precision approach and get down to a lower MDA/DH? It means you can use the LPV minima line on a RNAV(GPS) approach chart, and that assuming your 480 was properly installed you can follow localizer-like and glideslope-like needle guidance on that approach. |
#3
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WAAS GPS approach question.
Can you use the 480's glideslope to guide you into a VOR approach that
is NOT GPS, but using a descent gradient that will hit the altitude at the waypoints as charted? Same approach as flying it by hand, just a stabilized, even descent. Hope that makes sense. |
#4
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WAAS GPS approach question.
"Doug" wrote:
Can you use the 480's glideslope to guide you into a VOR approach that is NOT GPS, but using a descent gradient that will hit the altitude at the waypoints as charted? Same approach as flying it by hand, just a stabilized, even descent. Hope that makes sense. Assuming it's a VOR(GPS) approach, and not a circle to land only, Yes. The 480 provides VNAV guidance suitable for LNAV/VNAV or if not charted, then referred to as "advisory VNAV", but basically it works the same - you get vertical guidance to the runway. Mike |
#5
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WAAS GPS approach question.
"Dico" wrote in message oups.com... Hello, I read on the Garmin page that their 480 is Waas certified...so that you can fly precision approaches without an ILS... what does this mean exactly? If I'm coming into an airport with only an NDB approach, can I use the 480's capabilites to fly a precision approach and get down to a lower MDA/DH? If the airport has only an NDB approach, how are you going to fly a GPS approach of any sort? |
#6
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WAAS GPS approach question.
"Matt Barrow" wrote in message ... "Dico" wrote in message oups.com... Hello, I read on the Garmin page that their 480 is Waas certified...so that you can fly precision approaches without an ILS... what does this mean exactly? If I'm coming into an airport with only an NDB approach, can I use the 480's capabilites to fly a precision approach and get down to a lower MDA/DH? If the airport has only an NDB approach, how are you going to fly a GPS approach of any sort? In other words, if there isn't a published approach, you can't invent one for your own use. It's not legal and not safe. |
#7
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WAAS GPS approach question.
I thought the FAA approved the use of GPS for any NDB waypoint. A plane
without ADF can fly any ADF approach with a IFR approach certified GPS. GPS waypoints can also be used in lue of ADF for missed approach holds, so you can fly any approach that has "ADF required" without an ADF if you have an IFR certified GPS. "Matt Barrow" wrote in message ... "Dico" wrote in message oups.com... Hello, I read on the Garmin page that their 480 is Waas certified...so that you can fly precision approaches without an ILS... what does this mean exactly? If I'm coming into an airport with only an NDB approach, can I use the 480's capabilites to fly a precision approach and get down to a lower MDA/DH? If the airport has only an NDB approach, how are you going to fly a GPS approach of any sort? |
#8
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WAAS GPS approach question.
On Fri, 21 Apr 2006 01:53:42 GMT, "soxinbox" wrote:
I thought the FAA approved the use of GPS for any NDB waypoint. They did. But note the word "waypoint" A plane without ADF can fly any ADF approach with a IFR approach certified GPS. GPS waypoints can also be used in lue of ADF for missed approach holds, so you can fly any approach that has "ADF required" without an ADF if you have an IFR certified GPS. Note this from the AIM: (emphasis mine) "(6) Charted requirements for ADF and/or DME can be met using the GPS system, **EXCEPT** for use as the principal instrument approach navigation source." This would be true for a stand alone NDB approach (i.e. with no GPS overlay); and for the primary DME approach at Martin State (near BWI). If there is a published GPS overlay, that would be different. But not all NDB approaches have GPS overlays. Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA) |
#9
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WAAS GPS approach question.
Dico wrote:
If I'm coming into an airport with only an NDB approach, can I use the 480's capabilites to fly a precision approach and get down to a lower MDA/DH? -dr No. But if you have an RNAV approach with precision/vertical guidance component, (and I am presuming the approach lighting is up to snuff before that type of approach chart is issued).. then you could use the 480 box to execute that approach without any ground based navaid guidance. Dave |
#10
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WAAS GPS approach question.
WAAS Approaches have vertical guidance but they
are not classified as "Precision" Bill Hale |
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