Nigegilb,
this aircraft is quite literally, a mid-air collision waiting to happen.
Yes, it would be if we selected the A/P on and fell asleeep. Your statement is an affront to the Nimrod crews.
Because of a lack of TCAS, Nimrod crews are making do with ad hoc procedures, NVG look outs, use of aircraft radar etc.
Use of an aircraft radar, which is one of the best, and manned by a specialist is not "ad hoc".
Get back in your box.