What is 4-stage Pre-emption and Prioritisation?
This entails the ability of the terminal to “pre-empt” or override any existing communications, data or voice, which are classified at a lower priority, and is specified within IMO resolution A888(21) referenced above. Distress and safety calls are categorised on the basis of 4 distinct priorities, enabling the higher priority call to connect. In this way, an inbound or outbound distress voice call is able to override lower priority communications.
