Goto Section: 80.213 | 80.217 | Table of Contents
Revised as of December 2, 2020
Goto Year:2020 |
§ 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:
(2) Private coast stations, except in Alaska: 1kW
(3) Coast stations in Alaska, public and private:
(c) Coast station frequencies above 27500 kHz. The maximum power must
not exceed the values listed below.
(1) Coast stations:
156-162 MHz-50W1 2 13
1Maximum authorized power at the input terminals of the station
2See paragraph (h) of this section.
(2) Marine utility stations:
(d) Ship station frequencies below 27500 kHz. The maximum power must
not exceed the values listed below:
(1) Radiotelegraphy: All ships—2kW3
3For passenger ships 5000 gross tons and over—8kW. For cable-repair
ships operating on radiodetermination frequencies, 15 watts; see
(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—400W4
4For passenger ships 5000 gross tons and over—1kW.
(iii) All ships—Open waters; 4000-27500 kHz—1.5kW5.
5For 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—25W6
6Reducible to 1 watt or less, except for transmitters limited to public
correspondence channels and used in an automated system.
(2) Ship stations 216-220 MHz—25W7
(3) On board stations 456-468 MHz—4W8
8Certification 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 MHz9
9See paragraph (k) of this section.
(5) Ship radar stations with F3N emission—200 mW
(6) EPIRB—121.500 and 243.00 MHz10
10See subpart V of this part.
(7) EPIRB—156.750 and 156.800 MHz10
(f) Fixed stations. The maximum power must not exceed the values +
(1) Maritime support (receiver test):
R3E and J3C emission—150W
(2) Operational fixed: 72-76 MHz and above 162 MHz11
11See paragraph (l) of this section.
(3) Alaska—Private fixed:12
12The 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.
(4) Alaska—Public fixed:
(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
(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
(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
(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 § 80.381. The
operational requirements for 72-76 MHz are contained in subpart L of
(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; 82 FR 27213 , June 14, 2017]
Goto Section: 80.213 | 80.217
Goto Year: 2020 |
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