APPLICATION NOTE DREDGING PRECISION WITH THE USE OF A SUB-BOTTOM PROFILER CUSTOMER APPLICATION • Pewter Mining SOLUTION • EdgeTech Sub-bottom Proler EQUIPMENT • Underwater Equipment: EdgeTech SB-512S with 5-12 kHz CHIRP frequencies • Shipboard Equipment: EdgeTech 3200-XS Portable Topside Processor with computer running EdgeTech’s JStar software for aquistion and display IHC Systems B.V. is the market leader in process monitoring, control, automation, simulation and the integration of dredging, nautical and hydrographical tasks on board of dredgers. The company is always on the forefront of utilizing new technology to enhance the solutions they provide to the dredging community. IHC Systems B.V. is well versed in the use of leading edge electronics, information technology systems and sensors that aid them in their business of providing highly advanced technology based solutions. Mineral dredging and mining underwater can be a particular challenge because concentrations of deposits are often covered by, or near, other layers of material. Economically valuable deposits such as gold, tin, pewter, ilmenite, rutile or zircon are often buried under layers of sand, mud and clay. Pewter in particular, is challenging because it is often located under the sea oor, in valleys and most often on a rocky bottom. The challenge for a mineral dredger such as PT Timah is to nd the most economical way to extract and separate the “good” material from the “bad’. In this case, to nd and extract the pewter layers while avoiding the hard rock areas. Traditionally dredge operators use core samples and charts to estimate the location of the valuable layers of material. They then position their extraction tools to get close to the valuable layer while maintaining a large safety margin. This method while acceptable, is often more costly than being able to more precisely extract the valuable material with minimal core samples. One of the technologically advanced means to assist in this process is the utilization of an acoustic sub-bottom proling system. For more information please visit EdgeTech.com [email protected] | USA 1.508.291.0057

APPLICATION NOTE DREDGING PRECISION WITH THE USE OF A SUB-BOTTOM PROFILER Solution IHC provided an advanced technology based solution to PT Timah which aided them in their dredging operations. A critical part of this system was the EdgeTech SB-512 subbottom proler. The EdgeTech system was mounted on a research vessel and sub-bottom prole data was collected. This prole layer information was then converted to Digital Terrain Models (DTM). The DTMs were then transferred to the mining vessel where they used IHC Systems’ Dredge Track Presentation System (DTPS) for online visualization of the mining...