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Below are various links to help you get educated on the features and use of the Optimal Ranging Spar 300 and Utility Survey for Trimble Access system. This system allows users map out underground utilities in 3D by integrating revolutionary utility locating technology with your Trimble GNSS system. This allows users to map out underground lines in the field while only having to keep “casual contact” with the actual line being located. For more information go to Optimal Ranging’s website.