Description
Published:Began with 19th ed., Mar. 10, 1984; ceased with 21st ed., Mar. 23, 1991.
Item Description:Depths shown by isolines and soundings.
Relief shown by contours and spot heights.
"Soundings in feet."
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.