Depths shown by gradient tints, isolines and soundings.
Title from title screen (viewed on Mar. 6, 2008).
Includes table of depth gradients, hydrographic survey information, NOS hydrographic survey index and index to adjoining sheets.
"NOS NN 3-3."
Mode of access: Internet from the NGDC NOAA web site. Address as of 3/6/08: http://www.ngdc.noaa.gov/mgg/bathymetry/maps/previews/NN%5F3-3.pdf; current access via PURL.