### Question
What is the definition of Federal aid to navigation?


### Answer
The definition of **Federal aid to navigation** is as follows in *54 U.S.C. § 305101*:

> any device, operated and maintained by the United States, external to a vessel or aircraft, intended to assist a navigator to determine position or safe course, or to warn of dangers or obstructions to navigation

#### Citation:
  - *54 U.S.C. § 305101*
  - Heading: **Subtitle III-National Preservation Programs > DIVISION A-HISTORIC PRESERVATION > Subdivision 4-Other Organizations and Programs > CHAPTER 3051-HISTORIC LIGHT STATION PRESERVATION**

