I don't know the answer to either of these questions. It appeared to be a standard GPS receiver, but some investigation would reveal whether the manufacturer supports military mode.
http://docs.google.com/viewer?a=v&q=cache:7hhk_GsNmTQJ:w...
I never saw it on the car, but the antenna mount had a hinge that would allow it to stick out from the side of the car. But that would be rather conspicuous—I think that's why the antenna is so large.
I never saw it on the car, but the antenna mount had a hinge that would allow it to stick out from the side of the car. But that would be rather conspicuous—I think that's why the antenna is so large.