Keyword · 3 objects
depth measurements
A keyword drawn from what is visible in these objects, rather than from a fixed list. It exists because someone will look for this and nothing else.
Beaver Island Group nautical chart, 19171917 · NOAA Office of Coast Survey, Historical Map & Chart Collection
LAKE MICHIGAN COAST CHART NO.8, FRANKFORT TO CHARLEVOIX, MICH. INCLUDING MANITOU AND FOX ISLANDS (1926)1926 · NOAA Office of Coast Survey
LAKE MICHIGAN (1975) · 14900-11-19751975 · NOAA Office of Coast Survey