In a large Australian coal mine, a significant crack developed in one of the main walls of the pit. Finding a robust platform that could reliably measure any deviation in the wall and alert management immediately was critical to mitigate safety and production risk. Traditional optical monitoring techniques utilising a total station could be used in these scenarios. Although accurate, the manual operation of such an instrument would not generate the frequency of data required and increase the level of risk by requiring its manual operation. An autonomous optical solution would mitigate this but with a greater footprint of infrastructure and cost.