[Code of Federal Regulations] [Title 47, Volume 5] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 47CFR80.92] [Page 33] TITLE 47--TELECOMMUNICATION COMMISSION (CONTINUED) PART 80--STATIONS IN THE MARITIME SERVICES--Table of Contents Subpart C--Operating Requirements and Procedures Sec. 80.92 Prevention of interference. (a) The station operator must determine that the frequency is not in use by monitoring the frequency before transmitting, except for transmission of signals of distress. (b) When a radiocommunication causes interference to a communication which is already in progress, the interfering station must cease transmitting at the request of either party to the existing communication. As between nondistress traffic seeking to commence use of a frequency, the priority is established under Sec. 80.91. (c) Except in cases of distress, communications between ship stations or between ship and aircraft stations must not interfere with public coast stations. The ship or aircraft stations which cause interference must stop transmitting or change frequency upon the first request of the affected coast station.