Description
Published:13th ed. (Feb. 1/86)-14th ed. (Aug. 17/91).
Item Description:Depths shown by isolines and soundings.
Relief shown by hachures.
"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.