December 7, 2016 NGS to replace NAVD 88 in 2022: What GNSS users need to know — Part 10 By David B. Zilkoski
November 9, 2016 US military plans autonomous cargo-hauling and combat vehicles, drone swarms By Alan Cameron
![[FIGURE 1] New Datums: Approximate Orthometric Height Change](https://redesign.gpsworld.com/wp-content/uploads/2016/12/Fig1-datum-NGS-ortho-height-change.jpg)
