Furthermore, 'contact' is never used by military pilots on R/T except under a very specific circumstance that does not relate to any of the examples above. Its incorrect use, particularly by light a/c pilots who are trying to sound punchy, grates badly!
As military traffic is on 243, why should they give a f**K?
Also, they are probably more concerned with trying to see through their dirty windscreen, than playing the radio police.
Round here, the usual phrase is "have the number one in sight"
But how do you know you have the #1 in sight? A dangerous assumption to make.