Which index would apply to an aircraft 210 feet long?

Which index would apply to an aircraft 210 feet long?

• A. Index A
• B. Index B
• C. Index C
• D. Index E

Answer: (D)

Assigning an ARFF index is about matching the aircraft length to the length range that each index covers. A 210-foot aircraft falls into the middle range that begins at about 200 feet and extends to the next category’s upper limit. Therefore, the index designated for that 200-foot-and-over category is the appropriate one to use. The other indexes correspond to shorter or longer aircraft and wouldn’t accurately reflect the size of a 210-foot airframe, which influences response planning, equipment needs, and aircraft handling considerations during emergencies.

Assigning an ARFF index is about matching the aircraft length to the length range that each index covers. A 210-foot aircraft falls into the middle range that begins at about 200 feet and extends to the next category’s upper limit. Therefore, the index designated for that 200-foot-and-over category is the appropriate one to use. The other indexes correspond to shorter or longer aircraft and wouldn’t accurately reflect the size of a 210-foot airframe, which influences response planning, equipment needs, and aircraft handling considerations during emergencies.