Unique vessel identifiers (UVIs) such as IMO numbers help to improve maritime safety and security and to reduce illegal activities. Some vessels, however, cannot obtain an IMO number because they are not large enough, or because they are not authorized to operate outside waters under national jurisdiction. This database has been developed for those tuna fishing vessels that are not eligible to obtain an IMO number.
- TUVIxxxxxxx: A number issued by the tuna RFMOs during the process of creating a Consolidated List of Authorized Vessels (http://tuna-org.org/GlobalTVR.htm)
- ixxxxxxx: A number issued by ISSF. An ISSF UVI will only be issued to vessels that cannot obtain an IMO number.