> How come, when I flew to Scotland last year I could > see where we were on the screen in front of me.
The airplane has GPS on board to the pilots (and passengers) know where they are (and inertial navigation in the pre-GPS days, and celestial navigation before that). However, the GPS doesn't report back to ATC. When out of a radar control area, the pilots use position reports and other procedures to inform ATC of their location so separation can be maintained. -Justin ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-community/message.cfm/messageid:297869 Subscription: http://www.houseoffusion.com/groups/cf-community/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.5
