Description
Published:Began and ceased with 17th ed., June 27, 1992.
Item Description:Depths shown by soundings.
"Soundings in feet."
Includes table of channel depths and nautical chart diagram.
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.