SEACOR Marine Holdings Incorporated provides marine transportation services to offshore oil, natural gas, and windfarm facilities worldwide. Its offshore support and specialty vessels deliver cargo and personnel to offshore installations. Other offerings include mooring equipment to tether rigs to the seabed, assistance in placing them on location and moving them between regions, construction, well work-over, maintenance, decommissioning support, and other services. As of 2021/12/31, it operated 81 support and specialty vessels. SEACOR Marine was founded in 1989 and is headquartered in Houston, TX.