In this paper are presented aspects about optimal antifouling systems. There are know that the paints which are used in ship technologies are biocides (they are contained TBT- tri-butil-toluen) and now we must used another ecological paints. By 17 September 2007, 25 States representing 38.11% of the worlds merchant shipping tonnage signed the IMO AFS Convention (also known as the TBT Convention). This means that the Convention will enter into force one year after - 17 September 2008. According to the Convention text TBT-based paint must not be applied after 1 January 2003, and by 1 January 2008 no ships must carry active TBT-based paint on their hulls.The effect of the IMO AFS Convention entering into force 17 September 2008 is: The IMO Member States that have ratified the AFS Convention will require that the necessary documentation to prove compliance with the Convention is available on board all ships irrespective of flag entering their ports.
