16
16
The VHF marine radio communication system reserves channel 16 as a calling and distress channel. This channel is used for initiating communication and for broadcasting distress signals in case of emergencies at sea.
SOS, but the Titanic also used the CQD distress call.
sos
Mayday
Mayday is a distress call for help. It is used in a life threatening emergency and should be given three times in a row to be sure it is understood in the case of noisy or broken up communications.
In the United States, the safety and distress calling frequency for boats is primarily set at VHF Channel 16 (156.800 MHz). This channel is used for emergency communications, including distress calls and safety announcements. Boat operators are required to monitor this frequency when underway, as it is the primary channel for distress signaling and coordination with the Coast Guard and other vessels in case of emergencies.
The VHF frequency commonly used for maritime emergency communications is 156.8 MHz, designated as Channel 16 (also known as the international distress frequency). This channel is monitored by vessels and coast stations for distress calls and emergencies. In aviation, the emergency frequency is 121.5 MHz, which is also used for search and rescue operations.
D (Delta) channel: 16 kbpsD-channel takes care of call set-up, call control (call forwarding, call waiting, etc.), and maintenanceControl and maintenance can be done in real-time in D-channel while B-channel is still transmitting data-big elk!
Vessels typically monitor VHF Channel 16 (156.800 MHz), which is the international distress, safety, and calling frequency. This channel is used for emergency communications, distress signals, and initial contact for vessel-to-vessel or vessel-to-shore communications. Additionally, mariners may switch to other channels for further communication after establishing contact.
Animals such as birds, monkeys, and some mammals like foxes and rabbits are known to make shrieking sounds. This high-pitched vocalization is often used as a distress call or warning signal.
The number of whistles blown in a distress call can vary depending on the situation and the guidelines being followed. Typically, three short blasts on a whistle are commonly recognized as a universal signal for help or distress. This pattern is used to attract attention and indicate an emergency. Always ensure that the context and local protocols are considered when using a whistle in distress situations.