In a Distress situation where immediate help is needed but the vessel is not sinking, what should a GMDSS operator do?

In a distress situation where immediate assistance is required but the vessel is not sinking, the appropriate response for a GMDSS operator is to transmit distress calls using the available communication methods such as HF, MF, or VHF DSC (Digital Selective Calling) or through Inmarsat. This allows the operator to send a distress message that can quickly reach Coast Guard or rescue services, alerting them to the urgency of the situation.

Transmitting distress calls via these methods is crucial as they are specifically designed for emergency communications. The DSC system, for example, can automatically notify relevant authorities with the vessel's location and the nature of the distress, ensuring a swift response. The use of Inmarsat also provides reliable communication even in remote areas, enhancing the chance of a rapid rescue.

In contrast, switching off an EPIRB or SART would hinder the distress response efforts, as these devices are intended to assist in locating the vessel in distress. Providing notification to the RCC (Rescue Coordination Center) via VHF on channel 13 is a useful action, but it should typically follow an initial distress call to ensure immediate awareness of the situation. Lastly, the radiotelegraph automatic alarm signal is an older method and is less commonly used in favor of