MMSI Number

MMSI number is a unique nine-digit Maritime Mobile Service Identity assigned to vessels for identification in international maritime radio communications and tracking systems. Charter guests encounter this term when reviewing safety equipment documentation or during radio procedure training. The MMSI is transmitted by the yacht's VHF radio and emergency beacon (EPIRB) for identification during distress calls and vessel monitoring. International maritime regulations require every yacht to maintain an active, properly registered MMSI number.