I just had an existing 430 converted to
WAAS and added another new 430W to my stack. According to the radio shop the
antennas MUST be installed externally and in a certain configuration (not next
to one another). According to the shop Garmin mandates that their authorized
shops install them this way or not at all.
From: Lancair Mailing List [mailto:lml@lancaironlinenet] On Behalf Of Colyn Case at earthlink
Sent: Wednesday, July 02, 2008
11:42 AM
To: lml@lancaironline.net
Subject: [LML] WAAS antennas
Has anyone else noticed any issues with their WAAS GPS
installation?
I just convereted a 530 and 430 to 530W and
430W. My GPS antennas are on a tray just under the glass
section in front of the vertical stab on my IVP. Since I got Waas I get
"No GPS navigation - user other nav" message. It happens on the
ground, it happens whether near buildings or not, it happens to both navs but
at different times. It lasts from 30-45 seconds typically.
One theory that has been put forth is that the WAAS units
look further down the horizon (or need to to get a big enough constellation)
and that I may have some blockage at those low angles. So far I
haven't seen this happen in the air.
I also converted my cessna 530 to 530W. I
haven't noticed any issues. The antenna is OUTDOORS in that installation.