Here's a list of marine frequencies.

I= intership     P= port operations    C= commercial    G= coast guard/corps of engineers    T= radio telephone

Ch.       Mhz.                     Ch.         Mhz.                     Ch.         Mhz.                      Ch.         Mhz.                      Ch.         Mhz.

1    156.050    P                 2    156.100    C                     3    156.150     C                     4    156.200    C                   5    156.250      P

6    156.300      I                7    156.350    C                     8    156.400      I                     9    156.450    C                    10    156.500    C 

11    156.550    C             12    156.600   P                    13    156.650    P                     14    156.700    P                   15    156.750    P 

16    156.800    CALL      17    156.850  C                     18    156.900   C                      19    156.950   C                   20    157.000   P 

21    157.050   G             22     157.100  G                     23     157.150 G                       24     157.200  T                    25     157.250  T 

26     157.300   T             27     157.350   T                    28     157.400 T                        29     157.450                       30     157.500

31     157.550                  60     156.025                           61     156.075                          62     156.125                        63     156.175  P

64     156.225                 65     156.275   P                      66     156.325 P                       67     156.375 C                     68     156.425  C

69     156.475 C             70     156.525   C                      71     156.575 P                      72     156.625 P                      73     156.675   P

74    156.725 P              75     156.775   C                      76     156.825 C                      77     156.875 C                      78     156.925   C

79     156.975 C             80     157.025   C                      81     157.075  G                     82     157.125 G                      83     157.175   G 

84     157.225 T             85     157.275   T                       86     157.325   T                     87     157.375  T                     88     157.425

89     157.475                90     157.525

If you have limited channels to use, try ch. 14,16,and  random P & C chs.

Walkie talkies can be found on C & I chs. Channels that are unmarked are not normally used on the inland rivers.

Ch. 16 is the distress & calling channel monitored by all vessels.

Some channels are monitored by companies as dispatch channels. In my area ( Ashland/Ironton/Huntington ) the channels are as follows: 7 Sanyo harbor (Boggs Landing); 10 Boat Store; 12 McGinnis Inc.; 14 Locks; 17 Ashland Inc.; 70 McGinnis work ch; 82 Corps of Engineers Fleet