We have supplied equipment for work on a variety of hydrographic survey activities from the equator to the poles. Related activities include charting, dredging, coastal engineering, coastal zone management, and offshore resource development. Most surveys are primarily concerned with water depth. Of additional concern is the nature of the sea floor material (i.e. sand, mud, rock) because of the implications for anchoring, dredging, construction, pipeline, cable routing and fisheries habitats.