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 |
47 C.F.R. §80.364