I will be doing an APRS talk/demo in Northern Va at the Dolly Madison Library in Mclean VA tonight at 730 PM. There will be another one at the Deleware Sussix County Hamfest 12 April and of course the Dayton Forum. Emphasis will be on this web page topic: http://www.ew.usna.edu/~bruninga/APRS-tactical.html Bob, Wb4APR