The captain of the Portuguese-flagged ship Solong, a Russian national, has been arrested following a collision with the Stena Immaculate tanker off the coast of England. The incident resulted in a crew member being presumed dead and environmental concerns due to fuel spillage. The Solong failed safety tests last year, raising questions about its condition and maintenance. The German company Ernst Russ, which owns the Solong, confirmed the nationality of the captain, while further investigations are underway.