Cal Dive International, Inc. operates as a marine contractor providing manned diving, pipelay, and pipe burial services to the offshore oil and natural gas industry. It offers saturation, surface, and mixed gas diving services. The company also provides diving support services, such as construction, inspection, maintenance, repair, and decommissioning of offshore production and pipeline infrastructure on the Gulf of Mexico Outer Continental Shelf, as well as in select international offshore markets, such as the Middle East, southeast Asia, and Australia. Its customers include oil and natural gas producers, pipeline transmission companies, and offshore engineering and construction firms. As of December 31, 2006, the company owned and operated a fleet of 26 vessels, including 23 surface and saturation diving support vessels, as well as 3 shallow water pipelay vessels. Cal Dive International was founded in 1975 and is headquartered in Houston, Texas. Cal Dive International Inc. operates as a subsidiary of Helix Energy Solutions Group, Inc.