GulfMark Offshore, Inc., together with its subsidiaries, provides offshore marine services primarily to companies involved in offshore exploration and production of oil and natural gas. Its vessels provides various services that support the construction, positioning, and ongoing operation of offshore oil and natural gas drilling rigs and platforms. The company's offshore support vessels are used to transport materials, supplies, and personnel, as well as to move and position drilling structures. It also provides management services to other vessel owners. Its fleet consists of various types of vessels that include platform support vessels; anchor handling, towing, and support vessels; construction support vessels; standby rescue vessels; crewboats; specialty vessels; and utility vessels.