Siem Offshore Inc., together with its subsidiaries, owns and operates offshore support vessels for the offshore energy service industry and offshore renewables market. It operates platform supply vessels (PSVs); offshore subsea construction vessels (OSCVs); anchor-handling tug supply vessels (AHTS vessels); multipurpose field and ROV support vessels; scientific core drilling vessels (SCDVs); well intervention vessels (WIVs); and other vessels, including fast crew, fast supply, and oilspill recovery vessels. The company has a fleet of 28 vessels, which includes six PSVs, four OSCVs, eight AHTS vessels, two WIVs, one SCDV, five smaller Brazilian flagged vessels, and one Canadian flagged vessel comprising an AHTS vessel.