Let's WAKE this up! "Listen 365" Welcome to RR. Smith Mtn Lake marine traffic is sporadic. It takes spells of being active. I monitor all the marine frequencies at my location about 12 miles South West of the lake with an outside antenna. Fisherman make up most of the activity. Some Coast Guard Auxillary ("Aux Ardet") traffic occasionally, usually weekends. If there is an accident or incident, Ch 16, the Emergency channel, usually becomes active. It makes a difference as to where you were on the lake too, upper end or lower end? I wonder if you might have tried any NWS ( weather) frequencies and that would have given you an indication if your reception for the location was good or bad. Those frequencies are very close to the marine frequencies. Cell coverage is good on the lake and most communications will be there (un-monitorable). Try 156.8, 157.1, 157.05, 156.6, 156.425, 156.7, 156.625, 156.45, and 156.3 mhz.