Coast Guard Academy Graduate Tackles Real-World Issues

Coast Guard Academy internships require an independent research project. The current research posed the question of whether the current fleet of inland river towing vessels could pass the stability requirements of 46 CFR Subchapter S parts 170 and 173, now required for vessels subject to Subchapter M. The plan for study was to gather geometry files of a few different inland river towing vessels and test them against Subchapter S. The goal was to estimate a general state of stability of the towing vessels currently operating on the inland river system. The results showed that neither the length of the hull nor the beam was a driving factor in how the vessel responded. It proved that the freeboard is what will determine whether the vessel passes or fails the stability criteria. Therefore, it is recommended that the downflooding angle be increased by up to 5 degrees, depending on the vessel. Overall, this increases the general safety of the vessel and allows for some vessels that had previously failed to pass the regulations to now pass.


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  • Accession Number: 01705413
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 2 2019 9:57AM