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NETSCo Contracts with SS John G. Munson for Repowering Conversion

The SS John G. Munson was built more than 64 years ago by Manitowoc Shipbuilding (and lengthened in 1976 by Fraser Shipyard) as a Great Lakes steamer. The 768 ft x 72 ft laker’s steam plant consisted of two Foster Wheeler Type D boilers, two 7,000 hp Westinghouse Steam Turbines, and two 600 kW GE SSTG and one 500 kW Caterpillar SSDG generator for its stern thruster. After a conversion and repowering at Fincantieri Bay Shipbuilding in 2016 and 2017, the self-unloading bulker was reborn as the diesel-powered M/V John G. Munson. Its new propulsion plant is a 8,000 hp 6M43 MaK Tier 2 medium-speed diesel, with four 550 kW Caterpillar C18 SSDG generators, two Gesab oil-fired auxiliary boilers and one Gesab economizer. The propulsion plant was selected early on based on a feasibility study by NETSCo.

Under contract engineering, NETSCo developed a drawing package for shipyard bid estimating purposes. Additionally, it provided purchase technical specification preparation for owner-furnished auxiliary equipment vendor bid purposes. It also developed a detail engineering drawing package for shipyard installation purposes, and regulatory body plan approval for contract & detail engineering drawing purposes.*

Read the entire article about how the Lakes steamship SS John G Munson gets a new life as a diesel-powered self-unloader.

*Reprinted with permission Marine Log Magazine. Great Lakes Feature Issue. September 2017.

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