### Question
Can you define what Federal aid to navigation means?


### Answer
**Federal aid to navigation** is defined as the following in *16 U.S.C. § 470w*:

> 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, and shall include, but not be limited to, a light, lens, lantern, antenna, sound signal, camera, sensor, electronic navigation equipment, power source, or other associated equipment.

#### Citation:
  - *16 U.S.C. § 470w*
  - Heading: **CHAPTER 1A-HISTORIC SITES, BUILDINGS, OBJECTS, AND ANTIQUITIES > SUBCHAPTER II-NATIONAL HISTORIC PRESERVATION > Part C-General and Miscellaneous**

