3. Detectors and alarms. These are especially important if the public is allowed on board. Historically significant vessels should be fitted with bilge and fire alarms that transmit to a monitored central facility. The cost effectiveness of this measure will vary from ship to ship, but vessels wired for shore power should have alarms. Vessels without engine rooms or wiring are at less risk.
4. Extinguishers and fixed extinguishing systems (Halon, CO2, and sprinklers), water, and training in how to use these systems. Halon is now considered unacceptable for use in areas where people may be present.