Numerical Tool News

In a typical year, the waters surrounding British Columbia’s Port of Vancouver host approximately 3,000 deep sea commercial vessels and 19 of the 35 ferries operated by BC Ferries, one of the largest ferry operators in the world. These waters are also home to a wide variety of aquatic wildlife, including the southern resident killer whales (SRKW), which have been listed as endangered in Canada since 2003.With vessel-generated acoustic disturbances identified by Fisheries and Oceans Canada as one of four key threats to the SRKW…

The common perception of intact stability has remained largely unchanged over the last few decades, where a vessel’s stability is evaluated using classical and static means: limits on righting arms, residual areas, and determining maximal VCG (or minimal GM) composite curves. These methods are familiar to most naval architects and are taught at a fundamental level in most naval architecture engineering programs.But repeated incidents of dynamic failure in recent decades brings question to the adequacy of classical static stability criteria to provide a complete understanding of…