International distress frequency channel. 5 MHz: The international aeronautical emergency frequency, important for aircraft distress calls. MF/HF-SSB Radio - Distress, Urgency, Safety, & Hailing Frequencies The International Telecommunication Union (ITU,) the same organization that sets international regulations and International Distress/Emergency Frequencies 2182 kHz: International Maritime Distress and Calling Frequency for Radio telephony. 4340 kHz: NATO Combined Submarine Distress. 5 kHz, 8414. 156. 800 MHz) remains the international distress frequency, monitored 24/7 by the USCG and vessels. , 22A now 1022) In the maritime world, Channel 16 VHF is a widely recognized frequency for calling up ships and shore stations, and it's also used as an international distress frequency. 500 MHz it is the frequency for reporting a Pan Pan or a Channel 16 (156. 5 kHz, Channel 16 is the international distress, safety, and calling channel, while Channel 70 is set aside as a digital selective calling (DSC) distress The Global Maritime Distress and Safety System (GMDSS) provides critical communication channels for maritime safety. For the purposes of safety and distress there are certain frequencies that have been specially reserved for their exclusive use internationally. 121. Note: The 500 kHz International Distress and Calling Frequency for Radio Telephony has been replaced by the Global Maritime Distress and Safety System (GMDSS) since 1999. Set on 121. These frequencies are categorized Several HF maritime voice frequencies exist for long-distance distress calls: [6] 4125 kHz 6215 kHz 8291 kHz 12290 kHz 16420 kHz Marine VHF radio Channel 16 (156. In VHF bands, 123. Information about the safety of navigation (MSI) is transmitted using narrow-band letter-printing telegraphy at a frequency of 518 kHz (international NAVTEX system). The following signals, used or exhibited either together or separately, indicate distress and need of assistance: a) a gun or The frequencies used in the GMDSS are approved by the Radio Regulations of the International Telecommunication Union (ITU). 8 MHz: This frequency serves as the Given the global nature of travel with the potential risk of accidents, the international community has agreed that the use of certain frequencies be harmonised globally for distress and Distress and Diversion — The Distress and Diversion (D D) Frequency is an international standard radio frequency for aviation distress. In 2025, note the shift to four-digit channel numbers (e. g. 5 kHz, 4207. Such channels are known as distress, safety and l) a distress alert by means of digital selective calling (DSC) transmitted on: (i) VHF channel 70, or (ii) MF/HF on the frequencies 2187. 8 MHz) for short range maritime use . 8364 kHz: Survival The international distress and callins frequency 2 182 kHz The 2 182 kHz frequency is the international radiotelephony distress frequency, and shall be used for this Some distress frequencies may be used to call other stations to establish contact, whereupon the stations move to another frequency. 1 MHz serves as the international aeronautical on-scene frequency for air-to-air coordination and survivor communications via portable radios, enabling aircraft to relay positions and ANNEX IV: International Distress Signals 1. The purpose of this organization is Distress frequencies.
