Many military units and civilian groups provide support for this event and the Jubilee Challenge, including the Royal Wessex Yeomanry, Exeter UOTC, 243 Field Hospital RAMC, 6th Battalion The Rifles, two Sea King HC4 helicopters from 848 Naval Air Squadron, 39 (Skinners) Signal Regiment, two Gazelle helicopters from 7 Regiment Army Air Corps (Volunteers), Bristol UOTC and the Dartmoor Rescue Group.