Hydrographic Survey Services
We have the expertise to undertake a wide variety of surveys including hydrographic surveys, land surveys, metocean and environmental surveys. Whether offshore, coastal or in land, we can exceed your high expectations.
Subsea, Metocean and Environmental Surveys
Rovco have the expertise to conduct bathymetric surveys using either vessel or ROV deployed Multibeam Echosounders (MBES). By using a variety of the latest sensor and software packages we are able to design a survey spread that perfectly fits your requirements. The Digital Terrain Models (DTM) we produce can be used in a variety of applications such as determining safe sailing depths, pre-, post- and real time monitoring of dredging and lay activities as well as determining the position of subsea features such as sand bars, shoals and channels.
3D Photogrammetry or Image Based Modelling (IBM) is the next big thing in underwater survey and Rovco are leading this front. We are able to produce highly detailed, accurately scaled, true colour representations of subsea objects that provide an intuitive means of communicating information about the state of a subsea structure. IBM provides extremely high detail of small to medium sized objects to assess structural integrity of an asset, determine levels of marine growth or calculate volumes and surface areas.
Knowing the location of your asset is fundamental to ensuring project success. By using Ultra Short Baseline (USBL) acoustic positioning we can accurately and reliably determine the location of an underwater object, whether that be an ROV, towfish or anything else that needs to be given a position. USBL can be used to fix the location of an object using an ROV, or to provide the position of a towfish to improve confidence in the location of an item or area of interest.
By using modern, high-resolution side scan sonar (SSS), sub-bottom profilers (SBP) and magnetometers it is possible to detect obstructions or lost items on or just below the seabed. Depending on your requirements these systems can either be mounted on an ROV, deployed from a vessel using a pole or in the more traditional towed fashion. By using accurate GPS systems the precise location of a potential hazard can be plotted for later investigation by ROV or diver. These capabilities can be used to perform part of route surveys, allowing the most effective passage for a cable or pipeline.
Metocean and Environmetal
Using a variety of sensors and deployment means we are able to measure a wide range of water properties, both in the field and later in the laboratory. Depending on the application we can supply sensors designed for semi-permenant installation and long term monitoring or for vessel deployment for instantaneous readings. We can measure a number of physical water properties such as temperature, turbidity and the concentration of suspended solids, as well as chemical properties such as pH, dissolved gases and conductivity. Alongside this we can also monitor currents, waves and tides.
Terrestrial Laser Scanning (TLS) and 3D photogrammetry allows us to recreate scenes of almost any size with extremely high accuracy and precision. These models have a variety of purposes such as continuing a bathymetric survey above the water line, performing a baseline study of an area or to determine if there have been any changes. The outputs of our 3D modelling services are available in full colour, providing an intuitive means of communicating information within your organisation or to your clients.
Dimensional control (Dimcon) is used to precisely measure a constructed object, or to determine the relative positions between a number of objects. Dimcon is typically used to ascertain the location and orientation of survey sensors to ensure that necessary calculations are performed correctly. By using highly accurate equipment and industry standard software we are able to pin point a location to within a millimeter, providing confidence that your survey can be conducted at the highest accuracy.
Geodetic control is the means of creating a network of precisely determined positions from which other measurements can be made. Control surveys define the co-ordinates for the rest of the system and allow for the local positions to be tied back to an established network. We use a range of equipment including GNSS receivers, total stations as well as more traditional surveying equipment to establish geodetic control and tie these points into existing and new survey areas.