See that red spot on the chart? Sail over it and you'll find a Russian sub

Take RN exercise Unmanned Warrior, add drone data and Esri's ArcGIS maps...

The Royal Navy's Unmanned Warrior exercise, which concluded last week, was a good jolly for the various drones and other sensor-laden toys the RN wants to buy. Yet the real value is in the data processing, which is where mapping firm Esri came in."