Sec. 80.807  Requirements of radiotelephone installation.

    All radiotelephone installations in radiotelegraph equipped vessels 
must meet the following conditions.
    (a) The radiotelephone transmitter must be capable of transmission 
of A3E or H3E emission on 2182 kHz and must be capable of transmitting 
clearly perceptible signals from ship to ship during daytime, under 
normal conditions over a range of 150 nautical miles when used with an 
antenna system in accordance with paragraph (c) of this section. The 
transmitter must:
    (1) Have a duty cycle which allows for transmission of the 
radiotelephone alarm signal described in Sec. 80.221.
    (2) Provide 25 watts carrier power for A3E emission or 60 watts peak 
power on H3E emission into an artificial antenna consisting of 10 ohms 
resistance and 200 picofarads capacitance or 50 ohms nominal impedance 
to demonstrate compliance with the 150 nautical mile range requirement.

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    (3) Have a visual indication whenever the transmitter is supplying 
power to the antenna.
    (4) Have a two-tone alarm signal generator that meets Sec. 80.221.
    (5) The radiotelephone transmitter required by this paragraph may be 
contained in the same enclosure as the receiver required by paragraph 
(b) of this section. Additionally, these transmitters may have the 
capability to transmit J3E emissions.
    (b)(1) The radiotelephone receiver must receive A3E and H3E 
emissions when connected to the antenna system specified in paragraph 
(c) this section and must be preset to 2182 kHz. The receiver must 
additionally:
    (i) Provide an audio output of 50 milliwatts to a loudspeaker when 
the RF input is 50 microvolts. The 50 microvolt input signal must be 
modulated 30 percent at 400 Hertz and provide at least a 6 dB signal-to-
noise ratio when measured in the rated audio bandwidth.
    (ii) Be equipped with one or more loudspeakers capable of being used 
to maintain a watch on 2182 kHz at the principal operating position or 
in the room from which the vessel is normally steered.
    (2) The receiver required by Sec. 80.805 may be used instead of this 
receiver. If the watch is stood at the place from which the ship is 
normally steered, a radiotelephone distress frequency watch receiver 
must be used for this purpose.
    (3) This receiver may be contained in the same enclosure as the 
transmitter required by paragraph (a) of this section. Additionally, 
these receivers may have the capability to receive J3E emissions.
    (c) The antenna system must be as nondirectional and efficient as is 
practicable for the transmission and reception of radio ground waves 
over seawater. The installation and construction of the required antenna 
must ensure, insofar as is practicable, proper operation in time of 
emergency. If the required antenna is suspended between masts or other 
supports subject to whipping, a safety link must be installed which 
under heavy stress will reduce breakage of the antenna, the halyards, or 
any other supporting elements.
    (d) The radiotelephone installation must be provided with a device 
for permitting changeover from transmission to reception and vice versa 
without manual switching.
    (e) An artificial antenna must be provided to permit weekly checks, 
without causing interference, of the automatic device for generating the 
radiotelephone alarm signal on frequencies other than the radiotelephone 
distress frequency.
    (f) The radiotelephone installation must be located in the 
radiotelegraph operating room or in the room from which the ship is 
normally steered.
    (g) Demonstration of the radiotelephone installation may be required 
by Commission representatives to show compliance with applicable 
regulations.
    (h) The radiotelephone installation must be protected from excessive 
currents and voltages.
    (i) The radiotelephone installation must be maintained in an 
efficient condition.