This paper addresses principles of coherent design in the design of operational procedures, control systems and ground control stations for uninhabited aerial vehicles (UAVs). Creating a coherent set of operating procedures, automatic functions and Ground Control Stations (GCS) requires a systematic design approach that creates a consistent conceptual thread between these elements. Following this approach, Cognitive Work Analysis was used to develop procedures, automatic functions and ground control stations for continuous target surveillance using a UAV. The importance of the coherence was subsequently analyzed through human-in-the-loop simulation. The results indicate that UAV controllers, using coherent designs, achieve significantly higher mission performance and experience lower workloads than those using incoherently matched procedures, automatic functions and GCS.