Explainer: Wide Area Augmentation System

Do you know exactly what WAAS is, and what sets it apart from regular GPS? Could you explain it in a few sentences?  If not, this FAA fact sheet is for you.  Clearly written, and also includes a brief history of how WAAS was developed and deployed.

Interesting tidbit: according to the FAA, WAAS approaches now outnumber traditional ILS approaches.

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