> No doubt billions of $$$ has been spent by the Navy. Don'cha know 8^) I thought the navy used very long wave transmission at a low data rate to send messages to its submarines (when they can't surface). I remember hearing there is an antenna many miles long on the upper penninsula of Michgan for this purpose. Of course, you never know how real or unreal things are you "hear" about military projects. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu