§ 80.251   Scope.

   (a) This subpart gives the general technical requirements for
   certification of equipment used on compulsory ships. Such equipment
   includes automatic-alarm-signal keying devices, survival craft radio
   equipment, radar equipment and Ship Security Alert System (SSAS)
   equipment.

   (b) The equipment described in this subpart must be certificated.

   (c) The term transmitter means the transmitter unit and all auxiliary
   equipment necessary to make this unit operate as a main or emergency
   transmitter in a ship station at sea. Each separate motor-generator,
   rectifier, or other unit required to convert the ship primary power to
   the phase, frequency, or voltage necessary to energize the transmitter
   unit is considered a component of the transmitter.

   (d) Average ship station antenna means an actual antenna installed on
   board ship having a capacitance of 750 picofarads and an effective
   resistance of 4 ohms at a frequency of 500 kHz, or an artificial
   antenna having the same electrical characteristics.

   [ 51 FR 31213 , Sept. 2, 1986, as amended at  63 FR 36606 , July 7, 1998;
    68 FR 46966 , Aug. 7, 2003;  73 FR 4483 , Jan. 25, 2008;  76 FR 67612 , Nov.
   2, 2011]

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