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]