PT Wintermar Offshore Marine Tbk is an Indonesia-based company primarily engaged in provisioning offshore supporting transportation services for companies in the oil and gas industry. It owns and operates various types of vessels, such as platform supply vessels, anchor handling tugs, anchor handling tug supply vessels, fast utility vessels, offshore tugs, accommodation vessels, crew boats, oil barges, landing crafts, oil tankers and tug boats. Besides using its own vessels, the Company also charters its affiliates' and third-parties' vessels to provide its services. It is also engaged in other services, such as ship management. Its subsidiaries include PT Wintermar, PT Arial Niaga Nusantara, PT Sentosasegara Mulia Shipping, PT Hammar Marine Offshore, PT PSV Indonesia, Abbeypure Pte Ltd, PT Winpan Offshore, PT Win Offshore, PT Win Maritim and PT WM Offshore.