what is the nature / purpose of Predannack ?
It's Culdrose's satellite where sprog 705 pilots used to do circuits so as to stay out of the way of the grown-ups. CU is a bit of a shadow of its former self, so I suspect not much in the circuit these days. The FAA trains aircraft handlers at CU, and they have a primary duty to fight aircraft fires as well as move the aircraft to/on the deck, so they go to Predannack to train on airframes.