First there are many ways to turn an antenna
I will describe several antennas by type. Only one by model
First: The best RV antenna is the Winegard SENSAR IV especially if you install the Sensar Pro. indoor module.. NOTE Many antennas can benefit from the Sensar Pro.
NONE of the following antennas will out perform it
The worst: is a pure omnidirectional antenna.. No gain, And subect to multi-path reception which can actually cancel out a signal.
Better: RCA once sold a "Flying saucer" shaped antenna that had a rotor inside, it was a direcitonal antenna, operated via a remote control.. Note that when I say "Once" I'm talking the 1970's.. That antenna was prodced under several lables (I'm not sure RCA mad it, but they sold it) Radio Shack calls it an "HD antenna" (Marketing hype. all TV antennas are HD and SD, they are "I don't care" D" to the antenna it's all radio, period).
And finally there is the Winegard automatic antenna
There is also one automatic antenna that "Chats" with selected TV's or digital converters.. However it's not a long rang antenna no where near as good as the Winegard.
With the Winegard I understand (But since I don't have one can not tell you how to operate it) it defaults to aiming at the STRONGEST signal it receives.. You can.. if you choose. pick the 2nd or 3rd or 4th strongest (#th) and doing so may give you more choices.
The Sensar Pro module.. This replaces the traditional wall plate with switch, 12 volt socket, light and antenna connection.. You lose the useless 12 volt socket, and all the connections are on the rear (But on short cables) so you need to do a bit of "Work" to get a front panel connection.
It adds more gain, a signal strength meter, a signal "Scanner" and also provides 12 volt to the antenna head to operate the antenna's electronics.
IF your antenna can use it.> I highly recommend.