§ 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
   transmit^1 3 Coast 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
                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

   ^1Ship transmit frequencies in Groups C and D are not authorized for
   AMTS use.

   ^2Coast 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.

   ^3Ship transmit frequencies in Groups A and B are permitted to provide
   mobile-to-mobile communications where the written consent of all
   affected licensees is obtained.

   (3) As listed in the table in this paragraph, 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
   and copying at the Federal Communications Commission, Reference Center,
   445 12th Street, SW., Room CY   A257, Washington, DC 20554. 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. In addition to the listed EAs listed in the
   table in this paragraph, 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]

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Alaska Fixed Stations

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