### Question
What does defense feature mean?


### Answer
**Defense feature** has the following meaning in *10 U.S.C. § 9511*:

> equipment or design features included or incorporated in a civil aircraft which ensures the compatibility of such aircraft with the Department of Defense airlift system

#### Citation:
  - *10 U.S.C. § 9511*
  - Heading: **Subtitle D-Air Force   > PART IV-SERVICE, SUPPLY, AND PROCUREMENT > CHAPTER 931-CIVIL RESERVE AIR FLEET**

