What frequency should be monitored for distress calls in Sea Area A3?

The frequency that should be monitored for distress calls in Sea Area A3 is HF Frequency 8414.5 kHz. In the context of the Global Maritime Distress and Safety System (GMDSS), Sea Area A3 is defined as the area where coverage is available from satellite services. This area relies on High Frequency (HF) radio for distress communications.

The frequency 8414.5 kHz is designated specifically for maritime distress and safety communications in areas where satellite coverage is utilized, aligning with the GMDSS requirements for vessels operating in Sea Area A3. This frequency allows vessels to communicate distress signals and receive essential safety information.

In contrast, while VHF Channel 16, MF Frequency 2182.0 kHz, and VHF Channel 70 are indeed important distress frequencies, they are not specifically designated for Sea Area A3. VHF Channel 16 is commonly used in coastal and inland waters, while MF Frequency 2182.0 kHz is used in Sea Area A2, primarily for ships operating closer to shore. VHF Channel 70 is utilized for digital selective calling (DSC) but does not serve as the main distress frequency in Sea Area A3. Therefore, HF Frequency 8414.