What is the international distress frequency for maritime communication?

The international distress frequency for maritime communication is 156.800 MHz. This frequency is recognized globally for distress, safety, and calling purposes, particularly in the VHF radio band used for maritime operations. It allows vessels in distress to communicate with other nearby ships and coastal stations.

The frequency 121.5 MHz is primarily used for aeronautical emergency beacons and is designated for aviation distress. While it plays a critical role in aircraft communication, it is not the standard maritime distress frequency.

On the other hand, 27.255 MHz falls within the Citizens Band (CB) radio frequency, which is typically used for personal and recreational communication rather than maritime distress scenarios. Similarly, 243.0 MHz is used mainly for military aircraft distress signals and is not employed by vessels for maritime emergencies.

Understanding the designated frequencies for different types of communication is crucial for effective emergency response and safety in marine environments. The correct international distress frequency ensures that distress signals are given the highest priority and can be received by other vessels and emergency services quickly and efficiently.