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Resource Link
Classic Compass Instructions www.arnavsupplies.com/files/Classic_compass.pdf
Magnetic Declination Information www.en.wikipedia.org/wiki/Magnetic_declination
The USGS Map Store www.store.usgs.gov
Tom Harrison Maps www.tomharrisonmaps.com
Useful UTM Information www.uwgb.edu/dutchs/FieldMethods/UTMSystem.htm
Longitude Latitude to UTM www.uwgb.edu/dutchs/UsefulData/UTMFormulas.HTM
Adventure World Magazine www.adventureworldmagazine.com
San Francisco Tide and Current Info www.sfports.wr.usgs.gov/sfports.html
Free Tide Tables www.freetidetables.com/
The Libre Map Project www.libremap.org/