In the clear weather scenario a JTAC will visually acquire the attacking aircraft in order to give you final clearance to employ weaponry. A call such as 'tipping in' will be his cue to look up and cease the million and four other tasks he's performing at the time. He's looking in the right bit of sky for your nose to be in the right place etc etc.
Some operators - the USMC especially, used to ask for a 'wings level' call which would obviously come a few seconds after one had 'tipped in'.
I quite enjoyed the Firestrike book other than it seemed to marry up aircraft capabilities with those of the aircrew themselves. I was also not convinced that a JTAC could claim 'kills'. A little peculiar for someone not employing weaponry. Just my opinion.
Last edited by orca; 27th Jan 2013 at 16:30.