🔍 Key Concepts

• 46 CFR Subchapter M towing vessel fire protection definitions (look in Part 136 for definitions and Part 142 for fire systems) • What equipment the Coast Guard currently accepts as a fixed fire-extinguishing system on inspected vessels • Regulatory treatment of older halon and carbon dioxide systems

💭 Think About

• Look up the formal definition of a fixed fire-extinguishing system for towing vessels and list which types are named there. • Ask yourself which of these options is no longer generally approved for new installations, even though some legacy systems may still exist on older vessels. • Consider which systems are emphasized as acceptable modern alternatives for machinery space protection on towing vessels.

✅ Before You Answer

• Verify exactly which systems are explicitly listed in 46 CFR as examples of a fixed fire-extinguishing system on towing vessels. • Check whether any of these systems is described in the regulations as being phased out, not for new installations, or legacy only. • Confirm that the three correct options are clearly included under the regulatory definition, and that the remaining option is treated differently in the rules.