Description
Published:22nd ed. (Feb. 8/75)-29th ed. (Aug. 22/82).
Item Description:"Omega overprinted."
Depths shown by isolines and soundings.
Relief shown by hachures and spot heights.
"Soundings in fathoms."
"For offshore navigation only."
Includes location diagram of large scale charts.
Electronic resource.
Physical Description:online resource (maps) : color
"Omega overprinted."
Publication Frequency:Irregular