http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
prepared and published by Defense Mapping Agency Hydrographic/Topographic Center.
"LORAN-C counterpart of this chart is 7846."
Scale 1:2,187,400 at lat. 730ʹ. 1 in. = 30 nautical miles ;