Description
Published:Began with 20th ed., Apr. 4, 1998.
Item Description:"LORAN-C overprinted."
Depths shown by isolines and soundings.
Relief shown by contours and hachures.
"Soundings in feet."
Includes source diagram, tidal information, and diagram of large scale charts.
Editions kept current by periodic online updates.
Physical Description:1 online resource (maps) : color
Publication Frequency:Irregular
Format:The .jpg versions of these maps require Adobe Photoshop or Adobe Acrobat 9 Pro to view.