US channels (US)
66 Appendix B: Maritime channels 98-171832-A
US channels (US)
L) 1 W TX power. Channels 13, 67 and 71 are limited to low transmission power.
B) Channels 2, 3, 4, 60, 61, 62, 64, 75 and 76 cannot be selected in US mode.
!) Channels 21A, 22A, 23A, 81A, 82A and 83A may be legally used in some
circumstances but not by the general public in US waters.
RX) Only RX: transmissions are blocked.
*) Channels 87 and 88 became simplex channels following the introduction of
AIS1 at 161.975 MHz and AIS2 on 162.025 MHz.
These are the default channels. Additional narrowband channels can be enabled,
see CHANNELS on page 42.
Channels TX RX SIMPLEX DUPLEX Channels TX RX SIMPLEX DUPLEX Channels RX
B) 63A 156,175 156,175 W4 162,425
6 156,300 156,300 65A 156,275 156,275 W6 162,500
7A 156,350 156,350 66A 156,325 156,325 W7 162,525
8 156,400 156,400 67 156,375 156,375
9 156,450 156,450 68 156,425 156,425
10 156,500 156,500 69 156,475 156,475
11 156,550 156,550 70 156,525 156,525
12 156,600 156,600 71 156,575 156,575
14 156,700 156,700 73 156,675 156,675
15 156,750
Distress and calling 75 B)
18A 156,900 156,900 77 156,875 156,875
19A 156,950 156,950 78A 156,925 156,925
20 157,000 161,600 79A 156,975 156,975
20A 157,000 157,000 80A 157,025 157,025
21A 157,050 157,050
!) 81A 157,075 157,075 !)
!) 82A 157,125 157,125 !)
!) 83A 157,175 157,175 !)
24 157,200 161,800 84 157,225 161,825
25 157,250 161,850 85 157,275 161,875
26 157,300 161,900 86 157,325 161,925
27 157,350 161,950 87A 157,375 157,375
28 157,400 162,000 88A 157,425 157,425 *)