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The FAA has agreements with ARINC Inc. and CSSI Inc. under which the FAA provides these private-sector
firms with GPS-based Monitoring Units, receiving in turn from them accurate aircraft geometric height estimates. It should be noted that monitoring services provided to operators are in accordance with fee schedules established by these firms
The contact information for CSSI and ARINC are as follows:
CSSI, Inc. GMS Operations Coordinator:
Tel +1 202-554-1050 or 866-GMU-8111
Fax +1 202-863-2398
monitor@cssiinc.com
ARINC, Inc. GMU Operations:
Tel +1 410-266-4707
Fax +1 410-573-3007
rvsmops@arinc.com
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