Sec. 80.385  Frequencies for automated systems.

    This section describes the carrier frequencies for the Automated 
Maritime Telecommunications System (AMTS) and for other automated multi-
station systems.
    (a) Automated Maritime Telecommunications System (AMTS). (1) The 
Automated Maritime Telecommunications System (AMTS) is an integrated and 
interconnected maritime communications system.
    (2) The following carrier frequency pairs are available for 
radiotelephony, facsimile and teleprinter communications. AMTS 
operations must not cause harmful interference to the U.S. Navy SPASUR 
system which operates in the band 216.880-217.080 MHz.

------------------------------------------------------------------------
                                         Carrier frequency (MHz)        
                               -----------------------------------------
          Channel No.               Ship          Coast                 
                                transmit \1\  transmit \2\      Group   
------------------------------------------------------------------------
101...........................  ............      216.0125  D           
102...........................  ............      216.0375  ............
103...........................  ............      216.0625  ............
104...........................  ............      216.0875  ............
105...........................  ............      216.1125  ............
106...........................  ............      216.1375  ............
107...........................  ............      216.1625  ............
108...........................  ............      216.1875  ............
109...........................  ............      216.2125  ............
110...........................  ............      216.2375  ............
111...........................  ............      216.2625  ............
112...........................  ............      216.2875  ............
113...........................  ............      216.3125  ............
114...........................  ............      216.3375  ............
115...........................  ............      216.3625  ............
116...........................  ............      216.3875  ............
117...........................  ............      216.4125  ............
118...........................  ............      216.4375  ............
119...........................  ............      216.4625  ............
120...........................  ............      216.4875  ............
121...........................  ............      216.5125  C           
122...........................  ............      216.5375  ............
123...........................  ............      216.5625  ............
124...........................  ............      216.5875  ............
125...........................  ............      216.6125  ............
126...........................  ............      216.6375  ............
127...........................  ............      216.6625  ............
128...........................  ............      216.6875  ............
129...........................  ............      216.7125  ............
130...........................  ............      216.7375  ............
131...........................  ............      216.7625  ............
132...........................  ............      216.7875  ............
133...........................  ............      216.8125  ............
134...........................  ............      216.8375  ............
135...........................  ............      216.8625  ............
136...........................  ............      216.8875  ............
137...........................  ............      216.9125  ............
138...........................  ............      216.9375  ............
139...........................  ............      216.9625  ............
140...........................  ............      216.9875  ............
141...........................      219.0125      217.0125  B           
142...........................      219.0375      217.0375  ............
143...........................      219.0625      217.0625  ............
144...........................      219.0875      217.0875  ............
145...........................      219.1125      217.1125  ............
146...........................      219.1375      217.1375  ............
147...........................      219.1625      217.1625  ............
148...........................      219.1875      217.1875  ............
149...........................      219.2125      217.2125  ............
150...........................      219.2375      217.2375  ............
151...........................      219.2625      217.2625  ............
152...........................      219.2875      217.2875  ............
153...........................      219.3125      217.3125  ............
154...........................      219.3375      217.3375  ............
155...........................      219.3625      217.3625  ............
156...........................      219.3875      217.3875  ............
157...........................      219.4125      217.4125  ............
158...........................      219.4375      217.4375  ............
159...........................      219.4625      217.4625  ............
160...........................      219.4875      217.4875  ............
161...........................      219.5125      217.5125  A           
162...........................      219.5375      217.5375  ............
163...........................      219.5625      217.5625  ............
164...........................      219.5875      217.5875  ............
165...........................      219.6125      217.6125  ............
166...........................      219.6375      217.6375  ............
167...........................      219.6625      217.6625  ............
168...........................      219.6875      217.6875  ............
169...........................      219.7125      217.7125  ............
170...........................      219.7375      217.7375  ............
171...........................      219.7625      217.7625  ............
172...........................      219.7875      217.7875  ............

[[Page 105]]

                                                                        
173...........................      219.8125      217.8125  ............
174...........................      219.8375      217.8375  ............
175...........................      219.8625      217.8625  ............
176...........................      219.8875      217.8875  ............
177...........................      219.9125      217.9125  ............
178...........................      219.9375      217.9375  ............
179...........................      219.9625      217.9625  ............
180...........................      219.9875      217.9875  ............
------------------------------------------------------------------------
\1\ Ship transmit frequencies in Group C and D are not authorized for   
  AMTS use.                                                             
\2\ Coast station operation on frequencies in Groups C and D are not    
  currently assignable and are shared on a secondary basis with the Low 
  Power Radio Service in part 95 of this chapter. Frequencies in the    
  band 216.750-217.000 MHz band are available for low power point-to-   
  point network control communications by AMTS coast stations under the 
  Low Power Radio Service (LPRS). LPRS operations are subject to the    
  conditions that no harmful interference is caused to the United States
  Navy's SPASUR radar system (216.88-217.08 MHz) or to TV reception     
  within the Grade B contour of any TV channel 13 station or within the 
  68 dBu predicted contour of any low power TV or TV translator station 
  operating on channel 13.                                              
                                                                        

    (3) Channels in the 219-220 MHz band are also used on a secondary, 
non-interference basis by amateur stations participating in digital 
message forwarding systems. Amateur stations may not cause harmful 
interference to AMTS operations and must accept any harmful interference 
from AMTS operation. Amateur stations within 80 km (50 miles) of an AMTS 
coast station must obtain written approval from the AMTS licensee prior 
to operating in the 219-220 MHz band. Amateur stations within 640 km 
(398 miles) of an AMTS coast station must notify the AMTS licensee in 
writing at least 30 days prior to initiation of operations in the 219-
220 MHz band. All amateur stations must notify the American Radio Relay 
League in writing at least 30 days prior to initiation of operations in 
the 219-220 MHz band (ARRL, 225 Main St., Newington, CT 06111-1494).
    (b) Narrowband operations in AMTS. AMTS licensees may operate on 
frequencies offset from the assignable channels specified in paragraph 
(a)(2) of this section provided such licensees are also licensed for 
channels on each side of the offset frequency. Licensees using offset 
frequencies must conform with all other conditions of operation.
    (c) Automated multi-station system. Great Lakes Region. The 
following table describes the assignable carrier frequency pairs to 
provide communication services including automated calling, teleprinter 
and facsimile:

------------------------------------------------------------------------
                                              Carrier frequency (MHz)   
           Channel designator            -------------------------------
                                           Ship transmit  Coast transmit
------------------------------------------------------------------------
17......................................            None     \1\ 156.850
84......................................         157.225         161.825
85......................................         157.275         161.875
86......................................         157.325         161.925
87......................................         157.375         161.975
------------------------------------------------------------------------
\1\ The frequency 156.850 MHz is used only to transmit scheduled weather
  broadcasts.                                                           

[ 51 FR 31213 , Sept. 2, 1986, as amended at  54 FR 29041 , July 11, 1989; 
 56 FR 3783 , Jan. 31, 1991;  57 FR 26780 , June 16, 1992;  60 FR 15687 , Mar. 
27, 1995;  61 FR 46566 , Sept. 4, 1996]

                          Alaska Fixed Stations