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and ground/ground voice communications system. [Figure 5-7] 

## NextGen Existing Improvements 

The goal of NextGen is to provide new capabilities that make air transportation safer and more reliable while improving the capacity of the NAS and reducing aviation’s impact on the environment. Below is a list of some of the capabilities for operational use that have already been implemented through NextGen. 

1. Starting in December 2009, the FAA began controlling air traffic over the Gulf of Mexico, an area of active airspace where surveillance was never before possible, using the satellite-based technology of ADS-B. For aircraft flying over the Gulf of Mexico, where no radar coverage is available, ATC can safely and more efficiently separate air traffic with the real-time visual representation of air traffic provided by ADS-B. It also provides pilots with 

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