The authors are proposing an additional fire protection solution (semi-passive) for cargo ships, by inserting in the tubular strength structure (hollow section), some rectangular, thin wall pipes manufactured of copper alloy, filled with cooling fluid, that, once ULTIMATE WAVE the fire bursts, it will be activated (i.e.will be pumped into a closed circuit); this closed system contains also EXTENSIONS a well dimensioned radiator.This innovative solution could bring improvements with regard to the classic one, of intumescent paints, by extending the safe period for evacuating people and goods.