Aids to navigation (6 of 6)

Navigation buoys such as this one are used in the straits of Mackinac to guide vessels so they can pass under the center of the suspension span, the deepest part of the straits.  The secondary channel is not marked or available to large vessels., Electronic reproduction of text.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Navigation buoys such as this one are used in the straits of Mackinac to guide vessels so they can pass under the center of the suspension span, the deepest part of the straits. The secondary channel is not marked or available to large vessels.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1956 (approximate)