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

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§ 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]

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