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        <gco:CharacterString>The Marine Trackline Geophysics database contains bathymetry, magnetics, gravity and seismic navigation data collected during marine cruises from 1939 to the present. Coverage is worldwide. Data sources include both US and foreign oceanographic institutions and government agencies. This map service shows tracks (both ship and airborne) for all geophysical surveys in the database, split into sub-layers by data type. This dynamic map service allows these sub-layers to be toggled on/off: All Survey Types (0) - visible by default; Bathymetry (1); Gravity (2); Magnetics (3); Multi-Channel Seismics (4); Seismic Refraction (5); Shot-Point Navigation (6); Side Scan Sonar (7); Single-Channel Seismics (8); Subbottom Profile (9); Aeromagnetic Surveys (10). Separate cached (tiled) map services are also available for several of these layers: All Survey Types (https://noaa.maps.arcgis.com/home/item.html?id=589adaec19ba48a9942ca9b13000c46d), Bathymetry (https://noaa.maps.arcgis.com/home/item.html?id=09dba3b48e8b49f4bcbf21f6e51ef6ed), Gravity (https://noaa.maps.arcgis.com/home/item.html?id=00cb8aa7607b4f11b78ef5a0e77921f5), Magnetics (https://noaa.maps.arcgis.com/home/item.html?id=09d6cfa8909545ddbfe93657ad761222), and Single-Channel Seismics (https://noaa.maps.arcgis.com/home/item.html?id=ff835a5df139428f992a6066151ffdda).</gco:CharacterString>
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      <gmi:platform xlink:title="Ronald Brown (RB)">
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                                <gco:CharacterString>303-438-8745</gco:CharacterString>
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                                <gco:CharacterString>303-438-8820</gco:CharacterString>
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                                <gco:CharacterString>2150 West 6th Avenue</gco:CharacterString>
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                              <gmd:city>
                                <gco:CharacterString>Broomfield</gco:CharacterString>
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                <gco:CharacterString>Coaxial magnetron, solid state IGBT modulator, and integrated low noise receiver front end, provision for future capabilities such dual polarity operation.</gco:CharacterString>
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          <gmi:instrument xlink:title="Seabeam 2112">
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                        <gco:CharacterString>L-3 ELAC Nautik</gco:CharacterString>
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                        <gmd:CI_Contact>
                          <gmd:onlineResource>
                            <gmd:CI_OnlineResource>
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                                <gmd:URL>http://www.elac-nautik.de/contact-contact/highlite-contact/322fa9862948e6f0530dcae7c7e8df7f/</gmd:URL>
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                            </gmd:CI_OnlineResource>
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                <gco:CharacterString>Seabeam 2112 (12 Khz) swath bathymetric sonar system. The system, originally used for high accuracy (Seabeam Classic) charting of the U.S. Exclusive Economic Zone (EEZ), is capable of hydrographic charting and seafloor acoustic backscatter imaging in water depths of 50 to 11,000 meters with up to 151 beams. Swath coverage (75 percent of water depth) varies as a function of depth, from 150 degrees at 1,000 meters, to 120 degrees at 5,000 meters, and 90 degrees at 11,000 meters, with a resolution of two degrees. The system regularly operates in 4000+ meters of water but is effective in shallower applications (less than 500m).</gco:CharacterString>
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