Chonghaejin Marine Company Ltd. or Cheonghaejin Marine Company Ltd. () was a South Korean shipping company that operated the ferry MV "Sewol", which sank en route from Incheon towards Jeju in 2014. The "Sewol" capsized in the Maenggol Channel carrying 476 people, mostly secondary school students from Danwon High School; 172 passengers and crew survived, while 304 were drowned or still missing.