Who needs an MMSI number?

An MMSI (Maritime Mobile Service Identity) number is essential for all vessels that are equipped with a Digital Selective Calling (DSC) radio. This is because the MMSI number is a unique identifier assigned to ships that allows for effective communication and safety at sea. When a vessel sends out a DSC distress call, the MMSI number is broadcasted as part of the message, allowing rescue services to quickly identify the vessel in distress and respond appropriately.

Having an MMSI number enhances maritime safety by enabling ship-to-ship and ship-to-shore communication. This identification is crucial not just for commercial operators but also for recreational, fishing, and government vessels. Therefore, stating that only commercially-operated vessels or only government vessels require an MMSI would disregard the broader requirement that encompasses all vessels with DSC capabilities, including those used for leisure and fishing.

In summary, since all vessels equipped with DSC radios need an MMSI number to facilitate critical communication and enhance safety, the assertion that only those vessels that have this communication equipment require an MMSI is the most accurate.