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Code of Federal Regulations (Last Updated: November 8, 2024) |
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Title 47 - Telecommunication |
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Chapter I - Federal Communications Commission |
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SubChapter D - Safety and Special Radio Services |
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Part 80 - Stations in the Maritime Services |
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Subpart H - Frequencies |
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Automated Systems |
§ 80.385 - Frequencies for automated systems.
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§ 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 Communications System (AMTS) is an automated maritime telecommunications system.
(2) The following carrier frequencies are available for assignment to public coast stations for public correspondence communications with ship stations and units on land. AMTS operations must not cause harmful interference to the U.S. Navy SPASUR system which operates in the band 216.880-217.080 MHz.
Channel No. Carrier frequency (MHz) Ship
transmit1 3Coast transmit2 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 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 (3) As listed in the table in this paragraph (a)(3), AMTS Areas (AMTSAs) are based on, and composed of one or more of, the U.S Department of Commerce's 172 Economic Areas (EAs). See 60 FR 13114 (March 10, 1995). In addition, the Commission shall treat Puerto Rico, the United States Virgin Islands, and the Gulf of Mexico as EA-like areas. The Gulf of Mexico EA extends from 12 nautical miles off the United States Gulf coast outward into the Gulf. See § 27.6(a)(2) of this chapter and 62 FR 9636. Maps of the EAs and AMTSAs are available for public inspection through the Federal Communications Commission's Reference Information Center. These maps and data are also available on the FCC website at www.fcc.gov/oet/info/maps/areas/. These maps and data are also available on the FCC Web site at www.fcc.gov/oet/info/maps/areas/. The Group A and B frequency pairs listed in the table in paragraph (a)(2) of this section are available for assignment to a single licensee in each of the AMTSAs listed in the table in this paragraph (a)(3). In addition to the listed EAs listed in the table in this paragraph (a)(3), each AMTSA also includes the adjacent waters under the jurisdiction of the United States.
AMTS areas (AMTSAs)
AMTSAs EAs 1 (Northern Atlantic) 1-5, 10 9, 11-23, 25, 42, 46 2 (Mid-Atlantic) 24, 26-34, 37, 38, 40, 41, 174 3 (Southern Atlantic) 35, 36, 39, 43-45, 47-53, 67-107, 113, 116-120, 122-125, 127, 130-134, 176 6-8, 54-66, 108, 109 4 (Mississippi River) 160-165 147, 166-170 5 (Great Lakes) 172 6 (Southern Pacific) 171 110-112, 114-115, 121, 126, 128, 129, 135-146, 148-159 7 (Northern Pacific) 8 (Hawaii) 9 (Alaska) 10 (Mountain) (4) 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) Subject to the requirements of § 1.924 of this chapter, §§ 80.215(h), and 80.475(a), each AMTS geographic area licensee may place stations anywhere within its region without obtaining prior Commission approval provided:
(1) The AMTS geographic area licensee must locate its stations at least 120 kilometers from the stations of co-channel site-based AMTS licensees. Shorter separations between such stations will be considered by the Commission on a case-by-case basis upon submission of a technical analysis indicating that at least 18 dB protection will be provided to a site-based licensee's predicted 38 dBu signal level contour. The site-based licensee's predicted 38 dBu signal level contour shall be calculated using the F(50, 50) field strength chart for Channels 7-13 in § 73.699 (Fig. 10) of this chapter, with a 9 dB correction for antenna height differential. The 18 dB protection to the site-based licensee's predicted 38 dBu signal level contour shall be calculated using the F(50, 10) field strength chart for Channels 7-13 in § 73.699 (Fig. 10a) of this chapter, with a 9 dB correction factor for antenna height differential.
(2) The locations and/or technical parameters of the transmitters are such that individual coordination of the channel assignment(s) with a foreign administration, under applicable international agreements and rules in this part, is not required.
(3) For any construction or alteration that would exceed the requirements of § 17.7 of this chapter, licensees must notify the appropriate Regional Office of the Federal Aviation Administration (FAA Form 7460-1) and file a request for antenna height clearance and obstruction marking and lighting specifications (FCC Form 854) with the FCC, Attn: Information Processing Branch, 1270 Fairfield Rd., Gettysburg, PA 17325-7245.
(4) The transmitters must not have a significant environmental effect as defined by §§ 1.1301 through 1.1319 of this chapter.
(c) Any recovered frequency blocks will revert automatically to the holder of the geographic area license within which such frequencies are included. Any frequency blocks recovered where there is no geographic area licensee will be retained by the Commission for future licensing.
[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; 67 FR 48565, July 25, 2002; 69 FR 19948, Apr. 15, 2004; 69 FR 44471, July 26, 2004; 73 FR 4486, Jan. 25, 2008; 75 FR 10692, Mar. 9, 2010 ; 85 FR 64409, Oct. 13, 2020; 88 FR 21449, Apr. 10, 2023]