On 14 December 2002 , the Norwegian auto carrier Tricolor collided with the Bahamian-registered Kariba and sank off Dunkirk harbor , causing a hazard to navigation in the English Channel . On 14 December 2002 , the Norwegian auto carrier Tricolor collided with the Bahamian-registered Kariba and sank off Dunkirk Harbour , causing a hazard to navigation in the English Channel .