I do do alot of track and trail missions but from the other side

i normally hang off the back end to one side sometimes close about 600 yards sometimes far 5 to 10 miles, trailing a xia is not difficault i can and have heard her 15 to 20nm away she is that loud.
i have this document about covert ops it covers track and trail as well.
http://www.commanders-academy.com/fi...nuals/Kap2.pdf
It might help.