Description
Published:Began and ceased with 6th ed., July 4, 1992.
Item Description:Depths shown by soundings and gradient tints.
Relief shown by contours and spot heights.
"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.