This release is a development release of new version 3.0 of Capytaine. The main novelty of this release is a complete rewrite of several of the internal modules, most notably the meshes module which has been rewritten from scratch, for licensing reasons, as well as to have a more straightforward and maintainable code. Due to the large amount of possible bugs and undocumented changes introduced by this refactoring, alpha release are being published during the latest stage of the development. Other notable changes include: a new Multibody class and a new internal representation for rigid body degrees of freedom, which should improve the hydrostatics and forward speed results for multibody setups. Some work remains to streamline this feature when exporting the NetCDF file. reduction of the amount of RAM needed for the computation, and more user information about the amount of RAM used by a batch resolution (the INFO logging level should be set). hydrostatics that are only defined on the immersed part (e.g. the center of buoyancy) are always only computed on the immersed part of the mesh, without the need for the user to explicitly clip the mesh. See docs/changelog.rst or https://capytaine.org/v3.0.0a1/changelog.html for more details.