Description
Published:Began with 22nd ed., Dec.15, 1984; ceased with 26th ed., Jan. 25, 1992.
Item Description:Depths shown by isolines and soundings.
Relief shown by contours and spot heights.
"Soundings in fathoms."
Includes source diagram and 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.