Thanks Andrew, I googled for aprs filters but didn't hit that page, all is explained as they say. Regards Tony VK3API On 20/02/2011 11:59 AM, Andrew Rich wrote: > http://www.aprs-is.net/javaprsfilter.aspx > > > > Sent from my iPhone > Andrew Rich > > On 20/02/2011, at 10:49, Tony King<vk3api at people.net.au> wrote: