Description
Published:Began with 5th ed., Sept. 20, 1975; ceased with 6th ed., Dec. 22, 1979.
Item Description:Depths shown by isolines and soundings.
Relief shown by contours.
"Soundings in fathoms."
Includes tidal information.
Electronic resource.
Physical Description:online resource (maps) : color
Publication Frequency:Irregular
Format:The .jpg versions of these maps require Adobe Photoshop or Adobe Acrobat 9 Pro to view.