At reference or see Europe Low Altitude Enroute Chart E(LO) 1A. An aircraft is flying from Inverness VORDME (N57°32.6'', W 004°02.5W) to Aberdeen VORDME (N57°18.6'', W002°16.0''W). At 1000 UTC the fix of the aircraft is determined by VORDME Inverness: radial = 114; DME-distance = 20.5 NM. At 1006 UTC the fix of the aircraft is determined by VORDME Aberdeen: radial = 294; DME-distance = 10.5 NM. What is the average GS of the aircraft between 1000 UTC and 1006 UTC?