1. 
   WAAS
   Wide Area Augmentation System is a FAA funded system of equipment and software that augments GPS. The WAAS provides a satellite signal for WAAS users to support enroute and precision approach aircraft navigation.
   Found op http://www.navtechgps.com/assets/1/7/NGPSAcronymsGlossary.pdf
   
   
2. 
   WAAS
   Wide Area Augmentation System
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
3. 
   WAAS
   Aviation acronym: World Airline Accident Summary
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   

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