They ain't paying us enough for this, man.
in the pipe means your in the lane for a run
5 x 5 is a radio term. one of them deals with signal strength and the other is clarity but i forget which is which. 5x5 pretty much means loud and clear.
I love the level of detail James Cameron goes into.
Most other writers or directors just get their characters to spout absolute bullshit that sounds "militaryish". Something like "EVASIVE MANOUVERES COPY THAT KILO TWO FLYING IN HOT YEAH BABY"