Couldn't have said it better Mark B.! I used another hams dual band HT to cross-band off his mobile while working as Course Marshal at Olympus this year. Wow, is that ever neat! Basically, it's like using your mobile as a repeater for your HT. This corner was fast and a 90 deg. right, and the run off was straight ahead, AND the way we came in. So, it meant parking our rigs way down the road to block the road and stop potential rally cars hitting our rigs. Usually I can get my Jeep pretty close to the intersection, but not this time and cross-banding worked extremely well. The other point I can't stress is antennas. Make sure you get it matched, i.e., cut the right length. If it's not right you can loose a lot of your power! In fact, I bought an SWR meter and learned how to do it myself. Also, if you can, get away from a mag mount.