KT Submarine Co., Ltd. builds submarine cables and offshore plants in South Korea. It installs and maintains submarine fiber optic and power cables, and provides assembly and installation services for drilling rigs used in deep-sea crude oil exploration to DSME, SHI, and HHI. The company also installs, lays, and inspects submarine pipelines that transfer crude oil and natural gas from offshore fields to onshore storage, supplies communication and power between land and platforms, installs deep sea water pipelines, and offers offshore energy development services. Founded in 1995, it is headquartered in Busan, South Korea.