To request TELEX communications with another vessel, the GMDSS operator should:

To request TELEX communications with another vessel using GMDSS procedures, the proper course of action involves selecting Routine priority and entering the other vessel's MMSI. This process ensures that the communication is appropriately prioritized and directed to the specific vessel you're trying to reach.

Routine priority is the standard priority level for non-urgent communications. By selecting this priority, the operator indicates that while the communication is important, it does not require immediate attention. Entering the other vessel's MMSI (Maritime Mobile Service Identity) directs the transmission specifically to that vessel, making it easier for the recipient to recognize and respond to the communication.

This method conforms to standard operational procedures within the GMDSS framework, ensuring that the request is clear and accurately targeting the intended recipient, thus facilitating effective communication between vessels at sea.