Launching for the 200th time and loaded with one of its heaviest cargoes ever, the Atlas-Centaur rocket flexed its muscle and sped away from Cape Canaveral on Tuesday night with a U.S. Navy satellite for mobile communications to the military and White House.

The final year of launches in the current breed of Global Positioning System navigation satellites kicks off Wednesday afternoon aboard a Delta 4 rocket from Cape Canaveral.

The geostationary orbital satellite is the fourth and final in the Geostationary Operational Environmental Satellites-R (GOES-R) series. Liftoff happened at 5:26 p.m. EDT (2126 UTC).