For those of you who understand spanish check out 7.790 USB. This frequency is used by the "Angeles Verdes" Green Angeles. They patrol the Mexican highway helping stranted motorist and during emergencies or breakdowns. Mobile units have a tilted hf vertical for NVIS propagation. I get them quite well throughout the day in the Los Angeles area.
Receiver: AOR 7030+
antenna: Alpha Delta Dx Ultra @35 feet
Hector