The 55,000 gt car carrier 'Gravity Highway', which was under construction in Hyundai Mipo Shipyard, collided with chemical tanker 'Maritime Maisie' while on sea trials some 9 nautical miles off Busan, reports Yonhap News Agency. The impact caused a fire on the tanker, which was in danger of sinking, and some of the 27 crew members sustained light burns or abrasions, but none serious, officials informed Yonhap. Sixteen coast guard boats, some Navy vessels and helicopters were sent to the scene, and rescued all crew members aboard the tanker, officials said.