What is a relatively new system designed for communication between vessels?

The selection of the Digital Selective Calling (DSC) system as the correct answer highlights its significance in modern maritime communication. DSC is part of the Global Maritime Distress and Safety System (GMDSS) and was specifically developed to enhance safety at sea by allowing vessels to send distress calls automatically, including important information such as the vessel's identity and position. This automation simplifies the distress communication process and ensures that messages get through to nearby vessels and coast stations more quickly and reliably than traditional methods.

Unlike traditional VHF radios, which require verbal communication and can be less reliable under certain conditions, DSC provides a standardized and efficient means of signaling for immediate assistance. Moreover, DSC can also be utilized for routine communications, outfitting vessels with enhanced capabilities to reach out to either an individual vessel or a group of vessels selected by the operator.

This system stands out as a relatively recent development compared to the other options provided, which have been in use for a longer period. VHF radios have been around since the mid-20th century, SARTs are primarily used for rescue operations and have been utilized for some time, and SSB radio communication has been a standard for long-distance maritime communication for many years. Given its role in improving safety and operational efficiency