Magellan GPS PROMARK X, User Manual

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Appendix ProMARK X
A-4
The GPSIC has general GPS literature available free upon
request. The Center also maintains up-to-date almanac data
and Operational Advisory Broadcasts containing current con-
stellation status and planned satellite outages.
There are three ways to quickly obtain current information from
the GPSIC:
1. 24-hour recorded phone message at (703) 313-5905
2. Computer bulletin board at (703) 313-5910
3. 24-hour live information at phone (703) 313-5900
(Users who are calling from outside of the United States must
prefix these telephone numbers with “1”, the international
dialing code for the USA.)
There are other sources for GPS information, ranging from free,
governmentally produced literature to purchased professional
literature and seminars. The geography department of your
local college or the local office of the National Geodetic Survey
may be able to help.