🔍 Key Concepts

• 46 CFR Subchapter H requirements for fixed sprinkler systems on passenger vessels • The normal operating temperature conditions in a galley compared to living spaces • How fusible link temperature ratings are chosen to avoid false activation while still providing fire protection

💭 Think About

• Think about which space (galley vs living spaces) normally runs hotter during everyday operations and how that affects when a fusible link might melt. • Consider what would happen if the fusible link temperature rating were too low in a hot space—would that cause unwanted sprinkler activation? • Ask yourself whether U.S. regulations actually prohibit fusible-link sprinkler heads on passenger vessels, or if they regulate how they must be installed instead.

✅ Before You Answer

• Look at 46 CFR Subchapter H sections on automatic sprinkler systems and note any references to different temperature ratings for different spaces. • Verify whether galley areas are treated as higher-heat or higher-fire-risk spaces than living spaces in fire protection design. • Confirm whether the regulations allow fusible-link sprinkler heads and, if so, how temperature ratings should be matched to the space.