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MSC/Circular.1165 – Revised Guidelines for the Approval of Equivalent Water-Based Fire-Extinguishing Systems – Set A

Source: MSC/Circular.1165 – Revised Guidelines for the Approval of Equivalent Water-Based Fire-Extinguishing Systems for Machinery Spaces of Category A and Cargo Pump-Rooms, including Appendix A (component manufacturing standards) and Appendix B (test method).
Reference: imorules.com – MSC/Circ.1165

Question 2 of 10
2. Test approvals already conducted in accordance with the guidelines in MSC/Circ.668, as amended by MSC/Circ.728, should remain valid for how long?