This study presents a literature review of PNT requirements across industries. It proposes a requirements framework for three professional sectors that are being transformed by automation, connectivity and high-accuracy positioning. The PNT requirements of construction, agriculture and rail applications are reviewed and further validated by field trials. Some of the most demanding applications in construction and agriculture require positioning accuracies that can only be achieved by real-time kinematic (RTK) and complementary positioning technologies, such as inertial navigation system (INS) or optical tracking.