Difficult conditions are hampering search efforts . Vessel was refitted upon arrival in Korea in February last year . The ship is the first of its kind to be built by Hyundai Heavy Industries, a South Korean shipbuilding company that has been involved with building many other ships for the U.S. Navy and Marine Corps. `` The cranes are being moved as fast as possible , the focus is getting them there early , '' said Choi Myeong-beom , a Ministries of Oceans and Fisheries representative . Three giant `` sea cranes '' dispatched to the site .
Difficult conditions are hampering search efforts . Vessel was refitted upon arrival in Korea in February last year . The ship is the first of its kind to be built by Hyundai Heavy Industries, a South Korean shipbuilding company that has been involved with building many other ships for the U.S. Navy and Marine Corps. Three giant `` sea cranes '' dispatched to the site .