Description
Published:33rd ed. (Sept. 3/83)-37th ed. (Oct. 5/91).
Item Description:Relief shown by contours, hachures, and spot heights.
Depths shown by isolines and soundings.
"Soundings in fathoms."
Includes source diagram and index to enlargements of areas shown.
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.