http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Three ancillary maps show enlargements of principal map areas at scales of 1:25,000 and 1:40,000.
Includes tide chart for Galveston (Galveston Channel), Texas, facilities chart and nautical chart diagram.
Numbering realigned 1974 to conform to a new uniform US numbering system for all navigation charts.