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Rare separately issued US Coast Survey charts of the Harbors at Sheffield Island and Cawkin's Island, published in 1848.

Includes extensive sailing directions for each of the two areas.

Cawkin's Island is now called Cockenoe Island. The chart at the right extends from Chinaman's Island (now Chimon Island) and Copsy's Island (now Copps Island) in the south, to Cedar Point and Saugatuck Harbor. The area shown on the map includes, in modern times, the following landmarks:

  • Sprite Island Yacht Club
  • Saugatuck Harbor Yacht Club
  • Canfirled Island
  • Bermuda Lagoon
  • Cedar Point Yacht Club
  • Compo Beach & Yacht Club
  • Westport Longshore Club Park

The map of Sheffield Island Harbor includes the following modern landmarks:

  • Tavern Island
  • Wilson Cove
  • Pine Point
  • Ballast Reef
  • Butler's Island
  • Contentment Island
  • Goeller Cove
  • Ziegler's Cove
  • Fish Islands

This chart was issued separately and apparently did not appear in any of the annual reports of the Coast Survey.

United States Coast Survey Biography

The United States Office of the Coast Survey began in 1807, when Thomas Jefferson founded the Survey of the Coast. However, the fledgling office was plagued by the War of 1812 and disagreements over whether it should be civilian or military controlled. The entity was re-founded in 1832 with Ferdinand Rudolph Hassler as its superintendent. Although a civilian agency, many military officers served the office; army officers tended to perform the topographic surveys, while naval officers conducted the hydrographic work.

The Survey’s history was greatly affected by larger events in American history. During the Civil War, while the agency was led by Alexander Dallas Bache (Benjamin Franklin’s grandson), the Survey provided the Union army with charts. Survey personnel accompanied blockading squadrons in the field, making new charts in the process.

After the Civil War, as the country was settled, the Coast Survey sent parties to make new maps, employing scientists and naturalists like John Muir and Louis Agassiz in the process. By 1926, the Survey expanded their purview further to include aeronautical charts. During the Great Depression, the Coast Survey employed over 10,000 people and in the Second World War the office oversaw the production of 100 million maps for the Allies. Since 1970, the Coastal and Geodetic Survey has formed part of the National Oceanic and Atmospheric Administration (NOAA) and it is still producing navigational products and services today.