Depths shown by isolines. Title from title screen (viewed on Feb. 11, 2008). "Contours in meters." Includes depth gradient diagram, NOS hydrographic survey index, and index to adjoining sheets. "NH 17-4."
Mode of access: Internet from the NGDC NOAA web site. Address as of 2/11/08: http://www.ngdc.noaa.gov/mgg/bathymetry/maps/finals/NH%5F17-4/NH%5F17-4.pdf; current access via PURL.