Sec. 80.873  VHF radiotelephone transmitter.

    (a) The transmitter must be capable of transmission of G3E emission 
on 156.300 MHz and 156.800 MHz, and on frequencies which have been 
specified for use in a system established to promote safety of 
navigation. Vessels in waters of other Administrations are required to 
communicate on any channel designated by that Administration for 
navigational safety in the bands specified in Sec. 80.871(d).
    (b) The transmitter must be adjusted so that the transmission of 
speech normally produces peak modulation within the limits of 75 percent 
and 100 percent.
    (c) The transmitter must deliver a carrier power between 8 and 25 
watts into a 50 ohm effective resistance. Provision must be made for 
reducing the carrier power to a value between 0.1 and 1.0 watts.
    (d) The transmitter complies with the power output requirements 
specified in paragraph (c) of this section when:
    (1) The transmitter is capable of being adjusted for efficient use 
with an actual ship station transmitting antenna meeting the 
requirements of Sec. 80.876; and
    (2) The transmitter has been demonstrated capable, with normal 
operating voltages applied, of delivering not less than 8 watts of 
carrier power into 50 ohms effective resistance over the frequency band 
specified in Sec. 80.871(d). An individual demonstration of the power 
output capability of the transmitter, with the radiotelephone 
installation normally installed on board ship, may be required; and
    (3) It is type accepted as required by subpart F of this part.