A night chart of the Great Lakes and the St. Lawrence River. 746 lighthouses (632 still lit, 114 dark) glow in their lamps’ true colors, each sized by how far its light carries on a clear night, alongside 920 charted shipwrecks. Every light and wreck is numbered and listed in a full index by lake, with a legend that explains how to read marine light codes and a chart of shipwrecks by decade.
A night chart of the Great Lakes and the St. Lawrence River. 746 lighthouses (632 still lit, 114 dark) glow in their lamps’ true colors, each sized by how far its light carries on a clear night, alongside 920 charted shipwrecks. Every light and wreck is numbered and listed in a full index by lake, with a legend that explains how to read marine light codes and a chart of shipwrecks by decade.
