Navstar is a network of US satellites that provide GPS services. If that change is approved, the plane/slot, SVN/PRN, Block Type, and Clock information will no longer be available on NAVCEN’s (USCG's Navigation Centre) GPS Constellation webpage.

This will happen along with the change from the current ground control system to the Next Generation Operational Control System (OCX). Active Notice Advisories to Navstar Users (NANUs) will continue to be available.


Users of the Operational Advisory message, or the Section 1 information included in the message on NAVCEN’s GPS Constellation webpage, are called to submit a comment using the "Contact Us" link to say how the loss of this information would impact operations.

The CGSIC will compile responses from the community and provide them to the GPS Directorate in advance of the next GPS Public Interface Control Working Group.