laytonl Posted February 10, 2014 Report Posted February 10, 2014 It looks like Garmin has an upgrade to add vertical guidance to LP approaches. Good to see this improvement. Lee http://garmin.blogs.com/aviationalerts/2014/02/gns-400w500w-series-software-upgrade-to-main-software-version-510.html Quote
orionflt Posted February 10, 2014 Report Posted February 10, 2014 good to know, will have to add it to the list of updates when i do the 330 update Quote
Marauder Posted February 10, 2014 Report Posted February 10, 2014 I did not know this. You mean current 530 owners cannot fly LPV approaches? Is this true of the 430s as well? Sent using Tapatalk Quote
mike_elliott Posted February 10, 2014 Report Posted February 10, 2014 I wonder what this upgrade does to the data stream to other devices..... Quote
Jerry 5TJ Posted February 10, 2014 Report Posted February 10, 2014 I did not know this. You mean current 530 owners cannot fly LPV approaches? Is this true of the 430s as well?Sent using Tapatalk Current 530W boxes already work for LPV, this release adds support for LP+V approaches, among other upgrades and bug fixes. Yes, it applies to 4xxW series as well. See the Garmin release notes. http://garmin.blogs.com/files/1403a_adsn-1.pdf Quote
yvesg Posted February 10, 2014 Report Posted February 10, 2014 What is the difference between LPV and LP+V ? Yves Quote
Marauder Posted February 10, 2014 Report Posted February 10, 2014 What is the difference between LPV and LP+V ? Yves  Great question. I have never heard of a LP+V either. Quote
Jerry 5TJ Posted February 10, 2014 Report Posted February 10, 2014 Great question. I have never heard of a LP+V either. Have a look at http://airfactsjournal.com/2012/06/whats-an-lp-approach/ For discussion of LP vs LPV Quote
Marauder Posted February 10, 2014 Report Posted February 10, 2014 Have a look at http://airfactsjournal.com/2012/06/whats-an-lp-approach/ For discussion of LP vs LPV Â Got it. Sounds like an LNAV on steroids. Quote
yvesg Posted February 10, 2014 Report Posted February 10, 2014 Went through this article and still don't get it sorry... try again Jerry. They don't mention LP+V, only LPV... Yves Quote
yvesg Posted February 10, 2014 Report Posted February 10, 2014 Guess I went too fast... I looked at it again and found the section on LP + V, my bad! Yves Quote
kortopates Posted February 11, 2014 Report Posted February 11, 2014 I'll offer an explanation that may help what this s/w update really fixes: Recall with WASS GNS boxes such as the GNS430W and GNS530W, we have LNAV approaches where our Garmin boxes also added ADVISORY vertical guidance. These LNAV with advisory vertical guidance are LNAV +V and not to be confused with LNAV/VNAV or LPV.  More recently, when Garmin added LP approaches, which are localizer precision approaches like LPV, but with out any real vertical guidance they decided to remove the Advisory vertical guidance for approaches that included the new LP minimums. They got a lot of hate mail from users, because the majority of LP approaches added where added as additional minimums to already existing LNAV approaches that our WASS Garmin box had been previously adding advisory vertical guidance to as LNAV+V. In order to turn off vertical advisory guidance on the LP, they also had to remove it from the original LNAV approach since your box has no way of telling which minimums you are flying to, just the approach. (Instead, the box tells you the most precise approach type it will support based on computed positional error as you approach the FAF and annunciates it in the lower left corner (e.g. (LNAV, LPV etc.)  So what this fix does is bring back advisory vertical guidance to the LNAV approaches, as LNAV+V, (that lost it because they also had LP minimums) and added it to LP approaches as LP+V.  This was and still is a nice feature since it provides a calculated glide slope that doesn't drop below any step down fixes but advisory only since the glide slope may interfere with obstacles below the MDA to the threshold. For example, often these approaches will have a vertical GS that is NOT coincident with the visual glide slope because of obstacles near the runway environment requiring you to transition to a PAPI GS from the MDA down.  Lastly, LNAV+V advisory GS should not be confused with LNAV/VNAV approaches which do give you a true glide slope like LPV but also without the localizer type precision. Quote
yvesg Posted February 11, 2014 Report Posted February 11, 2014 Paul, thanks a lot for the explanation, things are much clearer... Now, the $500 question to all, how to get this firmware update without having to pay an arm and a leg? My unit just came back from Garmin in November. Yves Quote
laytonl Posted February 11, 2014 Author Report Posted February 11, 2014 I suspect your local avionics shop will be able to do this. Probably just an hour or so of labor. Lee Quote
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