Navigation Center
United States Coast Guard
U.S. Department of Homeland Security

GPS Problem Report

The Navigation Center appreciates your reports regarding service degradations, disruptions, or other incidents or anomalies. Please answer the questions below. Some fields are required for submission, but all personal data will be kept private and will only be used to contact you in the event that we need more information or if clarification is required. Please be as complete as possible when reporting an incident. Thank you!

Please read before submitting a report:

NAVCEN cannot assist you with equipment issues. We can confirm the status of the GPS constellation, determine if there is approved GPS testing in the vicinity, and request that interagency partners share correlating reports. Equipment errors are easily identified as single-device problems, such as when a vehicle GPS fails while a cell phone GPS continues to operate properly.

We recommend you follow the below steps before reporting a GPS problem.

  • Reset your device by cycling power to the unit.
  • Confirm the settings for your GPS unit or GPS application
  • Refer to your equipment manual
  • Update your equipment software or firmware and GPS mapping software
  • Contact your equipment manufacturer for additional assistance

For more information, please read our GPS Frequently Asked Questions page.

If your GPS unit or others' GPS units are leading people to an incorrect address OR are otherwise leading people to an incorrect location, the problem is not likely a "GPS" problem, but rather, it is very likely a MAPPING problem.

Unfortunately, the Navigation Center cannot assist you with GPS unit mapping problems, as we do not develop, control, nor repair the mapping software contained in GPS units, including vehicle navigation systems.

To correct mapping problems such as an incorrect address, or to request a change to the address for a business or home, or to add an address, please navigate to to submit your corrections online: How to Report a Mapping Problem Affecting GPS Devices, Apps, and Maps.

Aviation Users

If you are reporting a GPS issue relating to aviation (domestic or international) usage, please use the following link to report directly to the FAA (

Military Users

The GPS Operations Center (GPSOC) at Schriever Air Force Base, Colorado, is the focal point in the Department of Defense (DOD) for operational issues and questions concerning military use of GPS. The GPSOC, part of Air Force Space Command, provides DOD and allied GPS users worldwide with anomaly reports and other information 24 hours a day, seven days a week. Please use the following link to report directly to the GPSOC (

Civil Non-Aviation Users

If you are experiencing GPS issues relating to land-based or maritime positioning, navigation, or timing signals, please submit a GPS disruption report using the form below. Reports are posted on our GPS Problem Reports Status page after review by NAVCEN staff. Some of the information you provide in the form below will be posted to our website. Personally identifying information will not be posted. Equipment manufacturer information such as make and model will also not be posted.

Navigation Center Website Privacy Act Statement

Authority: 5 U.S.C 301; 14 U.S.C. 93(a) and (c); 14 U.S.C 632; 33 U.S.C 1223

Purpose: The Coast Guard Navigation Center will use this information to disseminate navigation safety notices and updates to individuals upon request and to receive reports of aid to navigation outages, issues or discrepancies.

Routine Uses: Coast Guard personnel will use this information to disseminate safety notices and updates and to aid in the repair or investigate reports of navigation outages, issues or discrepancies. Any external disclosures of data within this record will be made in accordance with DHS/ALL-002, Department of Homeland Security General Contact Lists, 73 Federal Register 71659, November 25, 2008, and DHS/USCG-013, Marine Information for Safety and Law Enforcement System of Records, 74 Federal Register 30305, June 25, 2009.

Disclosure: Furnishing this information is voluntary; however, failure to furnish the requested information may hinder your request for navigation safety related information.

* Denotes required fields.

5a) What was the time of the GPS disruption?

Format: 2024-07-22 00:22:46. Leave blank to use the time of form submission.
Enter any value from -90.000000 to +90.000000. An example is 59.123456
Enter any value from -180.000000 to +180.000000. An example is 132.123456.
Please enter a type(s) such as aviation, marine, surveying, agriculture, transportation, or timing.
Please enter explanation if "Other" is selected.
10b) Above Ground or Sea Level
12) How many satellites were being tracked at the time of the disruption?
Please provide any additional information, unusual screen display indicating a problem and/or operator intervention that may have helped