http://www.marinelink.com/news/bay-houston-receives-z-tech-tugboat/bay-houston-receives-z-tech-tugboat325760
Bay-Houston Receives Z-Tech Tugboat
Bay-Houston Towing took delivery of its first of their Z-Tech 7500 tugs. The Z-Tech 7500 design is the largest of the Robert Allan line of Z-Tech tugboats.