Subelement G: VHF-DSC Equipment & Comms— Topic :
Question 45G5
Element 7R (GMDSS-RO)What channel is always being continuously monitored?
Explanation
Ch-70 is the dedicated Digital Selective Calling (DSC) watch channel for VHF marine radio. All DSC-equipped vessels are required by regulation to continuously monitor Ch-70 for distress alerts, urgency calls, safety calls, and routine call requests. This digital channel allows for automated distress alerting and efficient establishment of voice communications on a working channel.
Ch-16 is the traditional international voice distress, safety, and calling channel, which is also vitally important and often monitored. However, modern maritime radio systems (GMDSS) mandate continuous, automated digital monitoring of Ch-70 for DSC alerts. Ch-28 and Ch-80 are typically working channels used for routine communications or port operations, not designated as primary continuous monitoring channels.
Related Questions
45G3 What channel would you use for routine communications with the U.S.C.G.?45G4 What channel would you use to place a call to a shore telephone?45G6 Which of the following channels may be used for duplex communications?46G1 The nearest Coast Guard station is being called by a vessel on Ch-22. That vessel’s USA-INT switch is set to INT. What will be the results?46G2 What is the reason for the USA-INT control or function?