Description
Published:24th ed. (Apr. 21/90).
Item Description:Depths shown by isolines and soundings.
Relief shown by contours and spot heights.
"Formerly C & GS 6122, 1st edition, June 1891."
"Soundings in feet."
Includes tidal information.
Electronic resource.
Physical Description:online resource (maps) : color
Publication Frequency:Irregular