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<title>FAQ - AIS</title>
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<meta name="Keywords" content="GPS, DGPS, LORAN-C, OMEGA, Navigation Systems, GPS Navigation, DGPS Navigation">
<meta name="Date Published" content="4/1/2001">
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<td align="center" valign="center"><a class="graynavbarlinks" href="http://www.navcen.uscg.gov/navinfo/tim-entry.aspx">Consolidated
Nav Info</a> </td>
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<td align="center" valign="center"><a class="graynavbarlinks" href="http://www.navcen.uscg.gov/navinfo/Dgps/DgpsStatusBySite.aspx">DGPS Advisories</a></td>
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<td align="center" valign="center"><a class="graynavbarlinks" href="http://www.navcen.uscg.gov/navinfo/Gps/ActiveNanu.aspx">GPS
Advisories / NANUs</a></td>
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<td align="center" valign="center"><a class="graynavbarlinks" href="http://www.navcen.uscg.gov/gps/gpsnotices/Gps_Interference.pdf">GPS
Testing Notices</a></td>
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<td align="center" valign="center"><a class="graynavbarlinks" href="http://www.navcen.uscg.gov/lnm/default.htm">LNMs</a></td>
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<td align="center" valign="center"><a class="graynavbarlinks" href="http://www.navcen.uscg.gov/gps/almanacs.htm">
Almanacs</a></td>
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<td align="center" valign="center"><a class="graynavbarlinks" href="http://www.navcen.uscg.gov/mwv/navrules/navrules.htm">Nav
Rules</a></td><td width="3">|</td>
<td align="center" valign="center"><a class="graynavbarlinks" href="http://www.navcen.uscg.gov/enav/ais/default.htm">AIS</a></td>
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Us</a></td>
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<td class="subsection_title">Automatic ID System (AIS) </td>
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<tr>
<td><div class="left_nav_menu">
<ul class="navlist1_mainv3">
<li><a href="http://www.navcen.uscg.gov/enav/ais/default.htm">AIS Overview - What
is AIS? </a></li>
<li><a href="http://www.navcen.uscg.gov/enav/ais/how_AIS_works.htm">How AIS Works
</a></li>
<li><a href="http://www.navcen.uscg.gov/enav/ais/what_AIS_broadcasts.htm">What AIS
Broadcasts</a></li>
<li><a href="http://www.navcen.uscg.gov/enav/ais/types_of_AIS.htm">Types of AIS</a></li>
<li><a href="http://www.navcen.uscg.gov/enav/ais/AIS_Certification.htm">AIS Certification</a></li>
<li><a href="http://www.navcen.uscg.gov/enav/ais/AIS_carriage_reqmts.htm">Carriage
Requirements</a></li>
<li><a href="http://www.navcen.uscg.gov/enav/ais/AIS_standards.htm">AIS References</a></li>
<li><a href="http://www.navcen.uscg.gov/enav/ais/AIS_Advisory.htm">AIS Notices</a></li>
<li><a href="http://www.navcen.uscg.gov/enav/ais/AISFAQ.htm">Frequently Asked Questions</a></li>
<li><a href="http://www.navcen.uscg.gov/ADO/ais_form.asp">Ask a Question or Report
an AIS Problem</a></li>
</ul>
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<td class="primary_section_title">Primary Mission
Areas:</td>
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<td><div class="left_nav_menu">
<ul class="navlist1_mainv3">
<li><a href="http://www.navcen.uscg.gov/gps/default.htm">Global Positioning System</a></li>
<li><a href="http://www.navcen.uscg.gov/dgps/default.htm">Differential GPS</a></li>
<li><a href="http://www.navcen.uscg.gov/ndgps/default.htm"> Nationwide DGPS</a></li>
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