What does FAR Part 139.315 pertain to?

FAR Part 139.315 pertains to the index calculation based on aircraft size and departures, which is crucial for determining the required level of firefighting and rescue services at public-use airports. This regulation establishes a framework that airports must follow in order to assess the types of aircraft that are expected to operate there, helping to classify the airport's Index. The Index is an essential factor as it influences the number of operational firefighting vehicles and personnel necessary to ensure passenger safety in case of an emergency.

Understanding this regulation is key for those in airport rescue and firefighting roles as it directly impacts the strategic planning for emergency response capabilities. By knowing how to calculate the Index correctly based on aircraft size and departures, fire departments can effectively allocate resources and enhance safety measures in their operations.