Working closely with Texas instruments we have produced a Texas approved calculator for Site Engineering.   Aimed at the busy site engineer on a tight budget it easily and quickly reduces field observations and calculates; • Free stations • Coordinates from bearing and distance • Bearings from coordinates • Coordinates from chainage and offset from an alignment • Chainage and offset from coordinates • Reduces field observations • Set out coordinates • Profiles • Batter rails • Plot layout   It is fully customisable, with preferences for traveller heights, target heights, angle formats etc.