47 CFR § 80.364 - Frequencies for VHF digital small message services (VDSMS).

---
identifier: "/us/cfr/t47/s80.364"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 80.364 - Frequencies for VHF digital small message services (VDSMS)."
title_number: 47
title_name: "Telecommunication"
section_number: "80.364"
section_name: "Frequencies for VHF digital small message services (VDSMS)."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "D"
subchapter_name: "SAFETY AND SPECIAL RADIO SERVICES"
part_number: "80"
part_name: "STATIONS IN THE MARITIME SERVICES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "47 U.S.C. 151-155, 301-609; 3 U.S.T. 3450, 3 U.S.T. 4726, 12 U.S.T. 2377."
regulatory_source: "51 FR 31213, Sept. 2, 1986, unless otherwise noted."
cfr_part: "80"
---


# 80.364 Frequencies for VHF digital small message services (VDSMS).

Frequencies in the 156-162 MHz band may be used for VHF digital small message services (VDSMS) complying with RTCM 12301 (incorporated by reference, *see* § 80.7), except as follows

VHF-FM Channels Not Available for Digital Small Message Service

| Channel | Frequency (MHz) |
| --- | --- |
| 01A | 156.050 |
| 63A | 156.175 |
| 05A | 156.250 |
| 65A | 156.275 |
| 06 | 156.300 |
| 66A | 156.325 |
| 67 | 156.375 |
| 70 | 156.525 |
| 12 | 156.600 |
| 13 | 156.650 |
| 73 | 156.675 |
| 14 | 156.700 |
| 74 | 156.725 |
| 15 | 156.750 |
| 75 | 156.775 |
| 16 | 156.800 |
| 76 | 156.825 |
| 17 | 156.850 |
| 77 | 156.875 |
| 20A | 157.000 |
| 22A | 157.100 |
| AIS ⁄ | 161.975/162.025 |

[81 FR 90747, Dec. 15, 2016]