Section 57. Identification number of vessel

Every public vessel subject to
  the provisions of this chapter  shall  be  registered  and  display  the
  identification  number  assigned  as  set  forth  in  section twenty-two
  hundred fifty-one of the vehicle and traffic law.  In  addition  to  the
  number  assigned,  each public vessel shall display the letters "PV" not
  more than six inches above  or  below  the  identification  number.  The
  letters "PV" shall be not less than five inches in height and maintained
  in   a  legible  condition  so  that  the  letters,  "PV",  are  readily
  discernible during daylight hours at a distance of two hundred feet.  It
  shall  be  the  duty  of  every owner to register and display numbers as
  herein indicated.  Violation  of  this  section  shall  be  a  violation
  punishable  by  a  fine  of  not less than twenty-five nor more than one
  hundred dollars.