cg9 banner
Nationwide Automatic Identification System


The Coast Guard’s Nationwide Automatic Identification System (NAIS) achieved full operational capability on May 24, 2018.

NAIS is now operational in 66 major U.S. ports and waterways, with the final three sites in Alaska to be deployed by the end of 2017.

  Program Information                       



NAIS contributes to a the concept of maritime domain awareness, which is a joint Coast Guard and U.S. Navy term for the effective understanding of anything associated with the global maritime domain that could impact the security, safety, economy or environment of the United States. By providing accurate information on vessel traffic to and from U.S. ports, NAIS helps to build a foundation of data that the government can use to develop effective maritime homeland security strategies.


  • Land, sea and space-based AIS radio frequency infrastructure capable of receiving and transmitting information from and to AIS-equipped vessels in U.S. coastal zones, waterways and ports
  • Integrated AIS data storage, processing and networking infrastructure