The Fugro system tracks aircraft kinematics with extreme accuracy, thus reducing the demands for extreme flight stability. The motto of the Fugro gravity system is "model, measure and correct - don't over filter". Filtering is minimised by applying an extensive suite of corrections derived from GPS velocities, sensor and platform modelling measurements prior to filtering. Clients are provided open access to all aspects of their data including in-field and final data processing and QC methods. System resolution and accuracy is evaluated by three independently measured analysis methods on data acquired in real world exploration conditions.