---
kind: "section"
citation: "47 C.F.R. § 80.393"
title: "47"
number: "80.393"
heading: "Frequencies for AIS stations."
url: "https://uscodex.org/cfr/47/80.393"
---

# §80.393. Frequencies for AIS stations.


Automatic Identification Systems (AIS) are a maritime broadcast service. The simplex channels at 156.775 MHz (AIS 3), 156.825 MHz (AIS 4), 161.975 MHz (AIS 1), and 162.025 MHz (AIS 2), each with a 25 kHz bandwidth, may be authorized only for AIS. In accordance with the Maritime Transportation Security Act, the United States Coast Guard regulates AIS carriage requirements for non-Federal Government ships. These requirements are codified at 33 CFR [164.46](/cfr/33/164.46.md), [401.20](/cfr/33/401.20.md).


## Notes

### Amendments

[82 FR 27213, June 14, 2017]

### Authority

Authority: 47 U.S.C. 151-155, 301-609; 3 U.S.T. 3450, 3 U.S.T. 4726, 12 U.S.T. 2377.

### Source

Source: 51 FR 31213, Sept. 2, 1986, unless otherwise noted.

### Amendments

[82 FR 27213, June 14, 2017]