### Question
How is the "proficiency flying" defined?


### Answer
The term **proficiency flying** is defined in *10 U.S.C. § 2245* as follows -

> given that term in Department of Defense Directive 1340.4.

#### Citation:
  - *10 U.S.C. § 2245*
  - Heading: **Subtitle A-General Military Law > PART IV-SERVICE, SUPPLY, AND PROCUREMENT > CHAPTER 134-MISCELLANEOUS ADMINISTRATIVE PROVISIONS > SUBCHAPTER I-MISCELLANEOUS AUTHORITIES, PROHIBITIONS, AND LIMITATIONS ON THE USE OF APPROPRIATED FUNDS**

