An inventory of American commercial shipping vessels used in ocean trade and on inland waterways is compiled and published annually in a three-part series by the Waterborne Commerce Statistics Center of the U.S. Army Corps of Engineers' Water Resources Support Center.

The center announced recently that the 28-page 1980 edition of Transportation Series 3, "Transportation Lines on the Great Lakes System," is available and may be purchased for $1 from the New Orleans Engineer District, LMNED-S, P.O. Box 60267, New Orleans, La. 70160. Other parts of the series will become available in the near future.