Step wilk, I knew we were returning because the vdu screens were down, so the turn around was easy as we started drawing circles on the screen, the speed is also displayed on this screen and the numbers went up considerably so I didn't need any telemetery just basic maths did the trick, plus it took us 20 mins to get where we were and approx 15 to return .....
JW it was a member of the crew who confirmed this