Sec.  80.215   Transmitter power.

   (a) Transmitter power shown on the radio station authorization is the
   maximum power the licensee is authorized to use. Power is expressed in the
   following terms:

   (1) For single sideband emission: Peak evelope power;

   (2) For G3E emission: Carrier power;

   (3) For PON and F3N emission: Mean power;

   (4) For all emissions in the 1626.5–1646.5 MHz band: equivalent isotropic
   radiated power.

   (5) For all other emissions: the carrier power multiplied by 1.67.

   (b) Coast station frequencies below 27500 kHz. The maximum power must not
   exceed the values listed below.

   (1) Public coast stations, except Alaska:

   (i) Radiotelegraphy:

   100–160 kHz—80kW

   405–525 kHz—40kW

   2035–2065 kHz—6.6kW

   4000–8000 kHz—10kW

   8000–9000 kHz—20kW

   12000–27500 kHz—30kW

   (ii) Radiotelephony:

   2000–4000 kHz—day—800W

   2000–4000 kHz—night—400W

   4000–27500 kHz—10kW

   (2) Private coast stations, except in Alaska: 1kW

   (3) Coast stations in Alaska, public and private:

   405–525 kHz—265W

   1605–12000 kHz—150W

   (c) Coast station frequencies above 27500 kHz. The maximum power must not
   exceed the values listed below.

   (1) Coast stations:

   156–162 MHz–50W ^1,2,13

   ^1 Maximum authorized power at the input terminals of the station antenna.

   216–220 MHz ^2

   ^2 See paragraph (h) of this section.

   (2) Marine utility stations:

   156–162 MHz—10W

   (d) Ship station frequencies below 27500 kHz. The maximum power must not
   exceed the values listed below:

   (1) Radiotelegraphy: All ships—2kW ^3

   ^3 For passenger ships 5000 gross tons and over—8kW. For cable-repair ships
   operating on radiodetermination frequencies, 15 watts; see  Sec. 80.375(b).

   (2) Radiotelephony:

   (i) All ships—Great Lakes and Inland Waters—150W

   (ii) All ships—Open waters; 2000–4000 kHz—150W

   2182 kHz—emergency, urgency, or safety ship to shore—400W ^4

   ^4 For passenger ships 5000 gross tons and over—1kW.

   (iii) All ships—Open waters; 4000–27500 kHz—1.5kW ^5 .

   ^5 For passenger ships 5,000 gross tons and over 3kW.

   (3) Digital selective calling:

   All ships 415–526.5 kHz—400 W

   All ships 1605–4000 kHz—400 W

   All ships 4000–27500 kHz—1.5 kW

   (e) Ship stations frequencies above 27500 kHz. The maximum power must not
   exceed the values listed below.

   (1) Ship stations 156–162 MHz—25W ^6, ^13

   ^6 Reducible to 1 watt or less, except for transmitters limited to public
   correspondence channels and used in an automated system.

   ^13 The frequencies 156.775 and 156.825 MHz are available for
   navigation-related port operations or ship movement only, and all
   precautions must be taken to avoid harmful interference to channel 16.
   Transmitter output power is limited to 1 watt for ship stations, and 10
   watts for coast stations.

   Marine utility stations and hand-held portable transmitters: 156–162 MHz–10W

   (2) Ship stations 216–220 MHz—25W ^7

   ^7 [Reserved]

   (3) On board stations 456–468 MHz—4W ^8

   ^8 Certification based on a carrier power of 4 watts with transmitter
   connected to a dummy load of matching impedance. The effective radiated
   power must not exceed 2 watts.

   (4) Ship earth stations 1626.5–1646.5 MHz ^9

   ^9 See paragraph (k) of this section.

   (5) Ship radar stations with F3N emission—200 mW

   (6) EPIRB—121.500 and 243.00 MHz ^10

   ^10 See subpart V of this part.

   (7) EPIRB—156.750 and 156.800 MHz ^10

   (f) Fixed stations. The maximum power must not exceed the values+ listed
   below.

   (1) Maritime support (receiver test):

   R3E and J3C emission—150W

   F3E emission—50W

   (2) Operational fixed: 72–76 MHz and above 162 MHz ^11

   ^11 See paragraph (l) of this section.

   (3) Alaska—Private fixed: ^12

   ^12 The frequencies 156.375 MHz and 156.650 MHz are primarily intership
   frequencies. When authorized for coast stations on a secondary basis, the
   normal output power must not exceed 1 watt and the maximum output power must
   not exceed 10 watts.

   10–200 kHz—650W

   405–525 kHz—265W

   1605–12000 kHz—150W

   (4) Alaska—Public fixed:

   405–525 kHz—1kW

   1605–12000 kHz—1kW

   (g) The carrier power of ship station radiotelephone transmitters, except
   portable transmitters, operating in the 156–162 MHz band must be at least 8
   but not more than 25 watts. Transmitters that use 12 volt lead acid storage
   batteries as a primary power source must be measured with a primary voltage
   between 12.2 and 13.7 volts DC. Additionally, unless otherwise indicated,
   equipment in radiotelephone ship stations operating in the 156–162 MHz band
   must meet the following requirements:

   (1) All transmitters and remote control units must be capable of reducing
   the carrier power to one watt or less;

   (2) Except as indicated in (g)(4) of this section, all transmitters
   manufactured after January 21, 1987, or in use after January 21, 1997, must
   automatically reduce the carrier power to one watt or less when the
   transmitter is tuned to 156.375 MHz or 156.650 MHz, and must be provided
   with a manual override switch which when held by an operator will permit
   full carrier power operation on 156.375 MHz and 156.650 MHz;

   (3) Except as indicated in (g)(4) of this section, all ship station
   transmitters installed after January 9, 2006, must be capable of tuning to
   156.775 MHz and 156.825 MHz and must automatically reduce the carrier power
   to one watt or less, with no manual override capability, when the
   transmitter is tuned to either 156.775 MHz or 156.825 MHz;

   (4) Hand-held portable transmitters are not required to comply with the
   automatic reduction of carrier power in (g)(2) of this section; and

   (5) Transmitters dedicated for use on public correspondence duplex channels
   as additional equipment to a VHF ship station in the Great Lakes which meet
   all pertinent rules in this part are not required to reduce their carrier
   power to one watt.

   (h) Coast stations in an AMTS may radiate as follows, subject to the
   condition that no harmful interference will be caused to television
   reception except that TV services authorized subsequent to the filing of the
   AMTS station application will not be protected.

   (1) When located more than 169 kilometers (105 miles) from the antenna of a
   Channel 13 TV station and more than 129 kilometers (80 miles) from the
   antenna of a channel 10 station, the ERP of coast stations having an antenna
   height of 61 meters (200 feet) or less above ground must not exceed 1000
   watts.

   (2) Coast stations located less than 169 kilometers (105 miles) from a
   channel 13 TV station, or less than 129 kilometers (80 miles) from a channel
   10 TV station, or when using a transmitting antenna height above ground
   greater than 61 meters (200 feet), must submit a plan to limit interference
   to TV reception, unless the station's predicted interference contour is
   fully encompassed by the composite interference contour of the system's
   existing stations, or the station's predicted interference contour extends
   the system's composite interference contour over water only (disregarding
   uninhabited islands). The plan must include:

   (i) A description of the interference contour with indentification of the
   method used to determine this contour; and

   (ii) A statement concerning the number of residences within the interference
   contour. The interference contour includes only areas inside the TV grade B
   contour with the latter determined assuming maximum permissible TV antenna
   height and power for broadcast stations and the actual facility parameters
   for translators and low power TV stations. See part 73, subpart E of this
   chapter for further information on TV grade B contour determination.

   (3) When located as described in paragraph (h)(2) of this section, the coast
   station (or stations affecting the same TV Grade B contour) will be
   authorized if the applicant's plan has limited the interference contour(s)
   to fewer than 100 residences or if the applicant:

   (i) Shows that the proposed site is the only suitable location (which, at
   the application stage, requires a showing that the proposed site is
   especially well-suited to provide the proposed service);

   (ii) Develops a plan to control any interference caused to TV reception
   within the Grade B contour from its operations; and

   (iii) Agrees to make such adjustments in the TV receivers affected as may be
   necessary to eliminate interference caused by its operations.

   (4) The applicant must eliminate any interference caused by its operation to
   TV reception within the Grade B contour that might develop within 90 days of
   the time it is notified in writing by the Commission. If this interference
   is not removed within the 90-day period, operation of the coast station must
   be discontinued. The licensee is expected to help resolve all complaints of
   interference, whether inside or outside the Grade B contour.

   (5) The transmitter power, as measured at the input terminals to the station
   antenna, must be 50 watts or less.

   (i) A ship station must have a transmitter output not exceeding 25 watts and
   an ERP not exceeding 18 watts. The maximum transmitter output power is
   permitted to be increased to 50 watts under the following conditions:

   (1) Increases exceeding 25 watts are made only by radio command from the
   controlling coast stations; and

   (2) The application for an equipment authorization demonstrates that the
   transmitter output power is 25 watts or less when external radio commands
   are not present.

   (j) A ship installation with a transmitter output power exceeding 25 watts
   under the conditions of paragraph (i) of this section is exempted from the
   limitation of 18 watts ERP when operating in specific geographical areas
   identified in a plan for the use of higher power.

   (k) Within the 1626.5–1646.5 MHz band the maximum e.i.r.p by a ship earth
   station in any direction in the horizontal plane or in the direction of the
   space station must not exceed +40 dB relative to one watt in any 4 kHz band
   in the main beam, except upon a satisfactory showing of need for greater
   power, in which case a maximum of +55 dB relative to one watt may be
   authorized.

   (l) For operational fixed stations using frequencies in the 72–76 MHz band
   and for other classes of stations operating above 162.025 MHz, the
   transmitter power must be specified in the station authorization.
   Frequencies in the 72–76 MHz band are listed in  Sec. 80.381. The operational
   requirements for 72–76 MHz are contained in subpart L of this part.

   (m) For radiodetermination transmitters using A1D, A2D, F1D, F2D, G1D and
   G2D emissions on 154.585 MHz, 159.480 MHz, 160.725 MHz, 160.785 MHz, 454.000
   MHz and 459.000 MHz the mean output power of the unmodulated carrier must
   not exceed 25 watts.

   (n) For radiodetermination stations operating above 2400 MHz the output
   power must be as follows:

   (1) For radar stations that use F3N emission the mean output power must not
   exceed 200 milliwatts;

   (2) For search and rescue stations the output power must be at least 400
   milliwatts peak e.i.r.p.

   (3) For all other transponder stations the output power must not exceed 20
   watts peak e.i.r.p. Licensees of non-selectable transponder coast stations
   operating in the 2920–3100 MHz and 9320–9500 MHz bands must notify in
   writing the USCG District Commander of any incremental increase of their
   station's output power above 5 watts peak e.i.r.p.

   [ 51 FR 31213 , Sept. 2, 1986, as amended at  52 FR 7419 , Mar. 11, 1987;  52 FR 35244 , Sept. 18, 1987;  54 FR 40058 , Sept. 29, 1989;  54 FR 49994 , Dec. 4,
   1989;  56 FR 3783 , Jan. 31, 1991;  59 FR 35269 , July 11, 1994;  63 FR 36606 ,
   July 7, 1998;  65 FR 77824 , Dec. 13, 2000;  67 FR 48564 , July 25, 2002;  68 FR 46965 , Aug. 7, 2003;  69 FR 64673 , Nov. 8, 2004]