Which statement regarding a multi-frequency MF/HF DSC Distress alert is false?

In the context of multi-frequency MF/HF DSC (Digital Selective Calling) Distress alerts, each unit operates based on established GMDSS (Global Maritime Distress and Safety System) protocols, but there is variability in how different units may function due to manufacturer specifications and programmed settings.

The statement about transmitting in ascending order of propagation radius is misleading because units do not necessarily follow a standardized order based on propagation characteristics. Instead, many units are programmed to prioritize certain frequencies based on regulatory requirements or operational preferences, which often include transmitting on mandated watch frequencies before utilizing other channels.

Prioritizing transmission on mandatory watch frequencies aligns with international maritime standards, ensuring that distress alerts are sent on frequencies that are monitored more routinely by rescue coordination centers and other vessels. This common preference can lead to a more effective distress communication process.

In contrast, variations in unit design and programming can result in different transmission sequences based on the manufacturer. Therefore, while some units may indeed operate in sophisticated patterns based on various factors, not every unit follows the same protocols or manufacturers' designs. This is where the statement about all units functioning identically falls short, as uniqueness among designs and operational criteria can lead to differing behaviors.