NOAA charts

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http://creativecommons.org/licenses/by-sa/2.0/	http://openstreetmap.org
Licensed under the Creative Commons Attribution-Share Alike 2.0 license by the OpenStreetMap project and its contributors.

Based on OpenStreetMap
and NOAA charts.

Loads NOAA if tiles exist at current zoom level, else redirects to OSM.

WARNING: Beta software - registration errors may exist, charts may not be current. Do not use as sole source of navigation data.