Virtual Glideslopes

Your article on GPS approaches featuring WAAS-enhanced glidepath generation was very informative and clarified a number of points. There is also another approach which is not an official FAA approach and, as far as I know, is only available using Garmin WAAS navigators. It is a LNAV+V approach, and you will not see it on the minima section of an approach chart.

Editorial Staff

Tuesday, November 25, 2014 at 12:00 AM ET

Verified

Key Takeaways:

A pilot clarifies the LNAV+V approach, noting it's a Garmin WAAS-specific advisory glideslope for LNAV minima, and questions the general statement about LNAV having advisory vertical guidance.
An ADS-B user praises their Garmin GDL 88 for reliable TIS-B traffic and terrain warnings, with the editor clarifying that certified systems like the GDL 88 properly receive complete TIS-B data.
Additional advice for water landings includes carrying small "spare air" breathing systems and a U.S. Coast Guard-recommended method for tethering a liferaft to a sinking plane to prevent it from drifting away.

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Your article on GPS approaches featuring WAAS-enhanced glidepath generation (Virtual Glideslopes) was very informative and clarified a number of points. There is also another approach which is not an official FAA approach and, as far as I know, is only available using Garmin WAAS navigators. It is a LNAV+V approach, and you will not see it on the minima section of an approach chart.