§  80.925   Electric light.

   (a) If the vessel is navigated at night an electric light or dial
   lights which clearly illuminate the operating controls must be
   installed to provide illumination of the operating controls at the
   principal operating position.

   (b) The electric light must be energized from the main power supply
   and, if a reserve power supply for the radiotelephone installation is
   required, from the reserve power supply.