IMO number

The International Maritime Organization (IMO) number is a unique identifier for ships, registered ship owners and management companies. IMO numbers were introduced to improve maritime safety and security and to reduce maritime fraud. They consist of the three letters "IMO" followed by unique seven-digit numbers, assigned under the International Convention for the Safety of Life at Sea (SOLAS).[1][2]

"IMO 8814275" on Eendracht
Stern of the Evangelia displaying "IMO 9176187" and a port of registry of "Majuro" in the Marshall Islands. In addition to the current name changed on 11 June 2005, parts of the ship's former names are visible: Cornelie Oldendorff and Asia Melody. On 9 August 2007, with a little blue paint, the ship's name changed again to Evangeli with a new flag country of South Korea. In all cases, the IMO number for this ship remains the same.

The IMO number scheme has been mandatory for all ships since 1 January 1996. The number identifies a ship and does not change when the ship's owner, country of registry or name changes. The ship's certificates must also bear the IMO number. Since 1 July 2004, passenger ships are also required to carry the marking on a horizontal surface visible from the air.[1]