http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Beginning in 1886 charts include methods of distributing oil to lessen heavy seas; and beginning in 1896, data on currents. Through Jan. 1889, charts include lists of notices to mariners. The reverse side of some charts contain supplements and other special features, as noted below.
Electronic reproduction. [Bethesda, Md.] : ProQuest, 2014. digital, PDF file. ProQuest U.S. Executive Branch Documents Mode of access: World Wide Web via ProQuest website.