For those users who would like to be notified of changes to the GPS Constellation, the U.S. Coast Guard Navigation Center NANU List Server is available to provide subscribers with an e-mail containing the NANU that is sent by the Navigation Center within 60 minutes of notification by the Air Force of a change to the GPS Constellation. Subscribe to the NANU List Server.

For those users who would like to receive GPS Status Messages, the U.S. Coast Guard Navigation Center GPS Status Message List Server is available. This service provides the subscriber with an e-mail containing the newly updated Status Message that is sent by the Navigation Center. The message is generally sent within 60 minutes of notification by the Air Force of a change to the GPS Constellation.

For those users who wish to check on recent changes to the GPS Status Message, the U.S. Coast Guard Navigation Center website GPS Status Message Page is available. This website-based service is updated daily between 1000 and 1400 EST, or as changes occur. Changes to the constellation which occur after 1800 EST are updated on the website at 0600 the next day.

Note: Please be aware that List Server emails are sent daily and every time the GPS Constellation changes.

PRIVACY INFORMATION: These mailing lists are "opt-in". Disclosure of your email address is voluntary. It is solicited for the sole purpose of delivering the requested information to you and will not be released to any other party.