Channel 16 VHF (156.8 MHz) is a marine VHF

radio frequency Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around . This is roughly between the upp ...

designated as an

international distress frequency An international distress frequency is a radio frequency that is designated for emergency communication by international agreement. History For much of the 20th century, 500 kHz was the primary international distress frequency. Its use has bee ...

. Primarily intended for distress, urgency and

safety Safety is the state of being "safe", the condition of being protected from harm or other danger. Safety can also refer to risk management, the control of recognized hazards in order to achieve an acceptable level of risk. Meanings There are ...

priority calls, the frequency may also carry routine calls used to establish communication before switching to another working channel.

Authorized usage

The

International Telecommunication Union The International Telecommunication Union is a specialized agency of the United Nations responsible for many matters related to information and communication technologies. It was established on 17 May 1865 as the International Telegraph Unio ...

(ITU) has established VHF channel 16 (156.8

MHz The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one he ...

) as a distress, safety and calling channel, and it is monitored 24 hours a day by many

coast guard A coast guard or coastguard is a maritime security organization of a particular country. The term embraces wide range of responsibilities in different countries, from being a heavily armed military force with customs and security duties to ...

s around the world. Radio watchkeeping regulations advise all sea bound vessels to monitor channel 16 VHF when sailing, except when communicating on other marine channels for legitimate business or operational reasons. Coast guards and others are permitted to broadcast short informative safety messages on channel 16; however, it is an offence in most countries to make false ''mayday'' calls. When using the channel to call up ships or shore stations, the call has to be switched to a working channel after the initial response in order to keep channel 16 available to others. Radio silence clock

References

{{reflist Distress signals Emergency communication International telecommunications Maritime communication Rescue

Authorized usage

See also

References