Ok, Antennas 1.000001
Antennas are always a trade off.. At one end of the road is the Winegard "Roadstar" which I call the "Flying saucer" (If you see one you will understand).
This is an omnidirectional (All directions) and, really not much good since RV parks are rarely close enough to the transmitters for it to see them (Not long range)
The basic batwing, by itself, is bi-directional, if you spread your arms like it does and look straight ahead.. Well it looks both straight ahead and to the rear (Again straight) fairly wide field of vision though.. But it can see farther than the roadstar omni.
Now let's go to the Jack... Also has no rear view far as I know, but pick up a set of opera glasses or low-power field glasses (Binoculars) Now you can see farther, but side vision is lost.
Back to the Batwing... Add the wingman... Swap out the binocs for a small telescope.. Still narrower field of vision but again you can see farther.
Now.. Add the Sensar Pro module indoors.... (The optional Winegard Booster).
MUCH more powerful telescope.. But you retain the last field of vision.
So, if you need a wide field: THe jack
If you need a long range Batwing with wingman and sensar pro.