I suggest the Clear Stream 4
http://www.antennasdirect.com , direct the antenna at 225 magnetic compass reading. No pre amplifier is needed.
http://www.antennasdirect.com/store/...V-antenna.html . The receiving elements of this UHF antenna are sealed in very Tuff Type Plastic , will last a long time outside. Antennas Direct uses a plastic bead and sonic heat welding that melds the plastic parts together , (no glue) it is so strong that to get it open you have to cut it open , it will not pry apart.