Which classification covers aircraft with a length between 159ft and 200ft?

The correct classification for aircraft with a length between 159 feet and 200 feet is Index D. This classification specifically addresses larger aircraft that fall within this range, which typically includes some of the heavier and longer commercial jets.

Index D is part of the overall aircraft rescue and firefighting (ARFF) index system that categorizes aircraft based on their size and potential fire hazards associated with them. This categorization is important for firefighting operations, as it helps determine the resources needed and the strategic approach to safely and effectively manage incidents involving these aircraft.

Aircraft in the Index D category often require specialized equipment and response strategies due to their size and complexity, making it crucial for firefighters to understand these distinctions in their training and operational procedures.