Final answer:
Mayday readiness is not explicitly defined by NFPA 1500; it refers to the emergency preparedness and protocols for firefighters facing potential extreme danger. NFPA 704 aids in this readiness by detailing substance hazards through its hazard identification system, which informs first responders about risks involved.
Step-by-step explanation:
NFPA 1500 does not specifically define "mayday readiness"; however, it outlines comprehensive health and safety standards that fire departments and their members should adhere to during emergency operations. Mayday readiness refers to the preparedness measures and protocols that need to be in place when firefighters find themselves in situations where they are facing uncertainty over whether a serious fire or hazard awaits after an alarm and there's a potential for extreme physical danger. It implies that firefighters and emergency personnel must be ready to declare a mayday when they are in distress and requires training on clear communication protocols, the use of emergency signaling devices, and procedures for personnel accountability.
The NFPA 704 Hazard Identification System provides additional safety information and plays a role in preparing for these hazardous situations by detailing the flammability, reactivity, health, and other hazards of substances. The information communicated through NFPA 704's diamond symbol helps first responders assess the risk and magnitude of a potential emergency and determines the urgency and nature of the mayday protocols that need to be invoked.