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Michigan Wheel Will Market Bow Thrusters —Literature Available Michigan Wheel Division, Dana Corporation, recently announced that it will now market a line of bow thrusters under the trade name of Michigan-Jastram. This exclusive arrangement applies to the United States, Canada, and Mexico. According to Chuck Dykstra, director of marketing of Michigan Wheel, the company has formed a new propulsion systems group that is consistent with its goal to provide quality propulsion equipment and systems for im- proved maneuverability for over- all vessel efficiency. Michigan Wheel, Mr. Dykstra indicated, is collaborating with Jastram-Werke of Hamburg, West Germany in manufacturing and marketing of the Michigan-Jastram line of bow thrusters in North America. Working with Dr. Dykstra at Michigan Wheel's divisional of- fices in Grand Rapids, Mich., will be Dave Johnson, propulsion sys- tems manager. Mr. Johnson ex- plains that an essential element of the Michigan-Jastram bow thruster is its high-quality ma- rine gearbox. He adds that since 1954, an ever-increasing number of ships of all sizes and types in Europe have been equipped with Jastram bow thrusters. The Ham- burg-based company is a leading European manufacturer of trans- verse, fixed-pitch bow thrusters. In the United States, the Jas- tram-supplied gears, along with Michigan propellers and trans- verse tunnels, will provide cost- efficient thrusters for the North American market. For further information and free literature on Michigan-Jas- tram, write to Charles Dykstra, Dept. M.R., Michigan Wheel Di- vision, 1501 Buchanan S.W., Grand Rapids, Mich. 49507. U.S. Yards Invited To Bid On First Maritime Prepositioning Ships Private American shipyards have been invited to bid on the first Lwo Maritime Prepositioning Ships, a new class of cargo ves- sels designed to provide standby logistic support for the rapid de- ployment of United States Ma- rines around the world. The invitation was extended by the Maritime Administration (MarAd), under a joint agree- ment with the Department of Defense. MarAd will serve as the contracting authority for the con- struction of the vessels, and will turn them over to the U.S. Navy upon delivery of the shipyard (s). The Naval Sea Systems Command will be responsible for the over- all program, and the Navy's Mil- itary Sealift Command will oper- ate the ships. A joint program office is being organized to ad- minister the entire program. Up to eight new ships in this class, designated by MarAd as C8-M-MA134j, are planned by the Navy. MarAd has invited sealed bids on the first two vessels (eith- er one or both) on or before Oc- tober 22, 1980. All bids will be publicly opened at the Commerce Department at 2:15 p.m. that day. The ships will have an overall length of 831 feet 6 inches, a dis- placement of 48,800 long tons at design draft, a carrying capacity of 28,000 deadweight tons, and a service speed of 20 knots. Interior cargo volume will ex- ceed 2.6 million cubic feet. Four twin deck cranes will provide both standard and heavy lift-on/ lift-off access to the ship's five holds. Vehicles will roll on and off the ship via a stern ramp. Each ship will have up to 225,000 square feet of roll-on/roll-off deck area, including cardecks, and a maxi- mum container capacity of 1,958 twenty-foot-equivalent units (TEUs). Options thus would be provided (continued on page 52) ENVIROVAC Vacuum Sewage Collection and Holding Systems. The Quality Leader in Marine Sewage Units. You'll find ENVIROVAC on Coast Guard and Navy ships. 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