rkaplan wrote: When flying this approach into KFKL using a Garmin 430/530, how low may you descent after crossing AYUSU?
Answer: The Mininum Descent Altitude with a Garmin 430/530 is 1900 feet. This is the LNAV or Lateral Navigation MDA.
Note: 1880 is the decision altitude for an LNAV/VNAV approach or an approach with both lateral and vertical navigation --- that requires a WAAS GPS approach receiver and the 430/530 are not currently WAAS certified. Similarly 1810 is the decision altitude for an LPV approach (lateral precision with vertical guidance) -- an LPV approach also requires a WAAS GPS receceiver.