Bay Houston Towing Co. provides services, such as ship assist/tanker escort as well as escort services to the LNG terminals in Freeport and Hackberry. Some of its fleet includes Z-Tech/tractor/twin/single screw tugs. The company is a member of the American Waterways Operators and has certification with the Responsible Carrier Program. Its fleet has certification with the International Safety Management system (ISM). The company s fleet is one of the youngest on the East and Gulf Coasts of the United States and is one of the most modern in the world. The fleet available to the company is the fourth largest harbor tug fleet in the United States.