๐Ÿ’กThe ENI number, or European Number of Identification, is a registration number for vessels on inland European waters.

Since April 2007, it has been required for vessels longer than 20 meters or more than 100 cubic meters. Tugs, push boats, service vessels, and passenger vessels also require an ENI number. The number is unique and attached permanently to the vessel for its entire lifetime. You find this number on each side and stern of the vessel.

It is an eight-digit identifier. The first 3 digits identify the competent authority, and the other digits are the serial number.

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