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The Civil Global Positioning System Service Interface Committee (CGSIC) is the recognized worldwide forum for effective interaction between all civil GPS users and the U.S. GPS authorities. The U.S. Coast Guard Navigation Center (NAVCEN) coordinates and manages CGSIC in cooperation with the Department of Transportation.

Purpose: The Department of Transportation established CGSIC to exchange information about GPS with the civil user community, respond to the needs of civil GPS users, and integrate GPS into civil sector applications. View charter on

Officers: The Executive Panel consists of the Chair, Deputy Chair, Subcommitte Chairs, and representatives from several different transportation modes.

Chair:  Karen Van Dyke
Director, Office of Positioning, Navigation and Timing (PNT) Programs
Office of the Assistant Secretary for Research and Technology
U.S. Department of Transportation
Deputy Chair: Captain Michael Glander
Commanding Officer
U.S. Coast Guard Navigation Center
International Deputy Chair: John Wilde
United Kingdom
Executive Secretariat: Rick Hamilton
GPS Information Analysis Team Lead
U.S. Coast Guard Navigation Center

Three subcommittees focus on specific user groups:
International Information Subcommittee (
Timing Subcommittee (
Survey, Mapping, and Geo-Sciences Subcommittee (

The CGSIC State and Local Government Subcommittee has been retired. The subject matter discussed in this subcommittee, typically relating to use of differential reference stations, has been taken up by the Surveying, Mapping,and Geo-Sciences Submittee.

The material discussed in the U.S. States and Local Government Subcommittee has been archived for reference at

How to get involved:

Public Participation: The CGSIC meets annually and is free to anyone interested in civil GPS issues.  Information from CGSIC meetings is provided to United States GPS authorities for consideration in GPS policy development and GPS service operation. Presentations from past CGSIC meetings are available on

Mailing List: If you would like to receive periodic emails concerning GPS operations, information about upcoming meetings, and other announcements from the CGSIC Executive Secretariat, please subscribe to the CGSIC mailing list.  You can find past CGSIC messages on NAVCEN's Message Archive page.

Questions/Subcommittees: If you have questions about CGSIC or would like to join one of the subcommittees, please contact the Executive Secretariat via NAVCEN's "contact us" form.

CGSIC Participation: If you wish to become a contributing participant and agree to be contacted directly by the CGSIC Executive Secretariat for input on matters pertaining to your organization, expertise, and to gain better insight into your specific user needs, please fill out the form below. Signing up below will not add you to the CGSIC mailing list (linked above).

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