Chart, Navigational

Lake Huron, Head of St. Clair River
to Pte. Aux Barques, Mich., and to Port Albert, Ont.

One navigational chart entitled, "Lake Huron, Head of St. Clair River to Pte. Aux Barques, Mich., and to Port Albert, Ont.," that was compiled and published by the U.S. Lake Survey, Corps of Engineers, U.S. Army. The chart (No. 51) is a polyconic projection and is drawn at a scale of 1:120,000. It shows lower half of Lake Huron. Land areas are shaded in pale yellow. Lake areas are shown in white and light blue depending upon water depths which are shown in feet. Distances are given in statute miles. Lines of latitude and longitude are shown in black. Course bearings are shown along with navigational range markers. Lighthouses and buoys are also noted. Enlarged inset charts are also shown for Port Sanilac and Harbor Beach, Michigan.