C12 Day at Prestwick - US Navy Herc too

I had a few hours to spare on Saturday 19th November 2011, so took a run down to Prestwick to see what was happening. It turned out to be quite eventful with 3 US Army C12s arriving and 2 that had ONS departing. There was also a USAF C130 Herc arriving and a US C130 Navy Herc that departed. Also a BA A321 had been in the BA/Iberia hanger for maintenence and departed for the long trip to Glasgow Airport! (20 miles?) The USAF Herc was about to take off but it needed 4 mins to calibrate its Navigational equipment, and I was well out of time!