Who needs an MMSI number?

An MMSI (Maritime Mobile Service Identity) number is essential for any vessel that operates a Digital Selective Calling (DSC) radio. The primary purpose of the MMSI number is to uniquely identify the vessel in communications and enhance safety at sea by enabling efficient distress signaling and communication with other vessels and shore stations.

Having an MMSI number allows a vessel's radio equipment to identify itself automatically when sending distress alerts, which is crucial for search and rescue operations. This identification is key in situations where time is of the essence, enabling authorities to quickly determine the vessel's details, such as its type and registered owner.

All vessels equipped with DSC radios are required to possess an MMSI number, regardless of their size or purpose, hence the importance of this requirement for safety and regulatory compliance in maritime activities.