Charts. Chesapeake Bay, Cape Henry to Thimble Shoal Light, Va., surveys to 1918, surveys by U. S. Engineers to 1920, surveys by Geological Survey; chart 481. Scale 1:20,000.
Publication Title:
Chesapeake Bay, Cape Henry to Thimble Shoal Light, Va., surveys to 1918, surveys by U. S. Engineers to 1920, surveys by Geological Survey; chart 481. Scale 1:20,000.
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Charts. Chesapeake Bay, Cape Henry to Thimble Shoal Light, Va., surveys to 1918, surveys by U. S. Engineers to 1920, surveys by Geological Survey; chart 481. Scale 1:20,000.