2.1 Update and complete TDA, including an updated assessment of the relative importance and transboundary impact of land-based and marine-based sources of pollution and filling the gaps identified in the Preliminary TDA.  2.2 Prepare, negotiate, and endorse at the national level a regional Strategic Action Programme (SAP) for port and navigational pollution reduction measures as well as reduction of other adverse land-based activities. . 2.3 Building on existing institutional arrangements where feasible, establish a regional focus for hydrography and oceanography related to navigational safety and spill planning and response, for hydrographic and oceanographic data processing and digitizing for navigation safety, as well as management and modeling (Marine) GID-based data applications 2.4 Develop and implement training program for national and regional entities in hydrography and oceanography related to navigational safety and spills, focusing on gaps identified including the assessment of oceanographic current dynamics, sediment transport and bathymetry.