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.