Horizon Offshore, Inc. (Horizon), incorporated on December 19, 1995, provides marine construction services for the offshore oil and gas and other energy-related industries in the United States Gulf of Mexico, Latin America, Southeast Asia and West Africa. The Company's primary services include laying, burying or repairing marine pipelines; providing hook-up and commissioning services; installing production platforms and other structures, and disassembling and salvaging production platforms and other structures. Horizon's fleet consists of nine operational vessels. These vessels are American Horizon, Lone Star Horizon, Brazos Horizon, Pecos Horizon, Canyon Horizon, Atlantic Horizon, Pacific Horizon, Sea Horizon and Texas Horizon. In February 2006, the Company acquired the Texas Horizon, a diving support and deepwater reel pipelay vessel. The Company's four operational pipelay and pipebury vessels are able to install and bury pipelines with an outside diameter (including concrete coating) of up to 39 inches. These vessels employ conventional S-lay technology that for operating on the United States continental shelf and the international areas where the Company operates. Pipelines installed on the United States continental shelf located in water depths of 200 feet or less are required by the regulations of the United States Department of Interior's Minerals Management Service to be buried at least three feet below the sea floor. For larger pipe burying projects, or where deeper trenching is required, the Company uses the Canyon Horizon, its dedicated bury barge. Horizon matches its burying approach to the requirements of each specific contract by using the Canyon Horizon for larger projects and its towed jet sleds behind pipelay barges for smaller projects. The Company also installs and removes or salvages offshore fixed platforms. Horizon operates two derrick barges equipped with cranes designed to lift and place platforms, structures or equipment into position for installation. In addition, they are used to disassemble and remove platforms and prepare them for salvage or refurbishment. The Pacific Horizon has a lift capacity of 1,000 tons and the Atlantic Horizon has a 550-ton lift capacity. During the year ended December 31, 2005, Horizon provided marine construction services for domestic customers in the United States Gulf of Mexico and foreign customers in Latin America, Southeast Asia, West Africa and the Mediterranean. Domestic operations accounted for 55% of consolidated revenues in 2005. Foreign operations represented 45% of consolidated revenues in 2005. The Company competes with Global Industries, Ltd. (Global), Cal Dive International, Inc. (Cal Dive), Chet Morrison Contractors, Inc., Cal Dive, Offshore Specialty Fabricators, Inc., TETRA Technologies, Inc., Manson Gulf L.L.C., J. Ray McDermott, S.A., Saipem S.p.A., Hyundai Heavy Industries Company Ltd., Willbros Group, Inc. and SaiBOS.