EarthWorks Geospatial Catalog

United States--Great Lakes, Lake Huron / Coast Survey.

"LORAN-C overprinted." Depths shown by isolines and soundings. Shipping list no.: 2002-0019-S. "Soundings in feet and fathoms (soundings in feet in blue tint areas and in fathoms elsewhere)." Includes source diagram and table of low water datum for Lake Michigan - Huron.
The Survey ;
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