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

Regulations last checked for updates: Feb 07, 2026

Title 47 - Telecommunication last revised: Jan 30, 2026

View all text of Subpart H [§ 80.351 - § 80.393]

§ 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 1/2	161.975/162.025

[81 FR 90747, Dec. 15, 2016]

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

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

cite as: 47 CFR 80.364