🔍 Key Concepts

• Types of fire detectors used on merchant vessels (smoke, heat, flame, etc.) • How modern fire detection systems often combine several detection methods • SOLAS/46 CFR intent: detect fire as early and reliably as possible

💭 Think About

• Ask yourself: Are merchant vessel fire systems usually limited to just one sensing method, or can they use several? • Think about what each option senses: which detects physical particles, which detects temperature behavior, and which detects visible products of combustion? • Consider what arrangement would give the best early warning of different kinds of fires (slow-smoldering vs. fast-flaming).

✅ Before You Answer

• Make sure you recognize that smoke, rapid temperature increase, and ionized particles are all valid fire indicators in marine systems. • Check if the question says "may be arranged" (what is allowed/possible), not "must be arranged" (what is required). • Confirm that each listed sensing method is used in some form of approved marine fire detector.