PT Supraco Indonesia - In 2008, Radiant Utama Group, through one of its subsidiary, PT. Supraco Indonesia, established PT. Supraco Lines to cater the needs of its Offshore Marine Customers in the industry. In 2011, PT. Supraco Lines has won its first Contract, the Spot Charter Contract for 3 months followed by the main Contract, Dredging & Lifting which lasts for 3 years. During that year, PT.