hull number
serial identification number given to a boat or ship
Maritime Mobile Service Identity
ID sent in digital form over a radio frequency to uniquely identify a ship
IMO number
unique identity number issued to seacraft
Rhine shipping number
number for ships in Europe
hull classification symbol
Wikimedia list article
pennant number
ship identifier in Europe
Naval Registry Identification Number
unique Naval identification number
Craft Identification Number
permanent unique fourteen-digit alphanumeric identifier issued to all marine vessels in Europe
official number
ship identifier number assigned to merchant ships