Just general interest ... http://arstechnica.com/business/news/2012/02/uk-research-measures-growing-gps-jamming-threat.ars Jim -- datalude: information security e: jim at datalude.com Philippines: +63 2 403 1311 / mob: +63 917 849 3939 Hong Kong: +852 6489 4132 w: http://www.datalude.com/