Includes hydrographic survey information, hydrography survey index, and index to adjoining sheets.
"NOS NK 19-4 (OCS)."
Available on the Internet from the NGDC NOAA web site. Address as of 3/15/07: http://www.ngdc.noaa.gov/mgg/bathymetry/maps/finals/N%5FK19-4/N%5FK19-4.pdf; current access via PURL.