What is the difference between DGPS or Differential GPS and LAAS or Local Area Augmentation System? Both appear to be a GBSS or ground based as opposed to satellite based. I know that all Garmin products are capable of receiving DGPS data but I think that is transmitted via UHF while the LAAS information is transmitted via VHF. But could I fly an LAAS approach to CAT I minimums with the 430W unit? I see there are some LAAS approaches at KEWR now and they only go to CAT I minimums.
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