Air Busan's official special baggage policy says a small instrument such as a violin can be carried in the cabin if its three dimensions total no more than 115 cm and it fits in an overhead bin or beneath a seat. To carry an expensive large instrument such as a cello, guitar or geomungo whose total dimensions exceed 115 cm, passengers must purchase an extra seat through the reservation center in advance. The additional seat follows the passenger seat's applicable fare, and promotional event fares are excluded. A large instrument outside a dedicated hard case may not qualify for damage compensation. Measure the instrument with its case and discuss the exact arrangements before booking.