The RT-1 rock trencher is the world's largest tracked underwater trencher. With 2.35MW of effective trenching power, it is designed specifically for the burial of pipelines and trunklines in hard soil regions. A triple chain cutter configuration defines a wide, sloping ‘V’ shaped trench allowing the stabilisation and protection of large diameter pipeline for trunkline burial. The vehicle is designed for use in hard ground regions such as the Arctic, the North West Australian shelf and the Shetlands.