[Code of Federal Regulations] [Title 33, Volume 1] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR62.57] [Page 150] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PART 62--UNITED STATES AIDS TO NAVIGATION SYSTEM--Table of Contents Subpart C--Maritime Radiobeacons Sec. 62.57 Carrier type operation. Radiobeacons superimpose the characteristic code on a carrier frequency which is on continuously during the period of transmission.This extends the usefulness of maritime radiobeacons to aircraft and ships employing automatic direction finders.