Abstract: A technique to electronically deliver a message from a sender to an intended recipient based on tracking movement of a mobile object, including obtaining a message provided by the sender, obtaining a location designated by the sender for delivery of the message, tracking a specified mobile object having a position-determining device that determines its own current position, and which transmits its then current position at preset time intervals, determining from the transmitted current position whether the specified mobile object has reached the designated location, and initiating a procedure for automatic delivery of the message electronically to the intended recipient upon the specified mobile object being determined to have reached the designated location.

Abstract: A position sensing system which allows the arthroscopist to readily determine the location of an arthroscope's tip in relation to the point of entry has been developed. The position sensing apparatus can be employed in conjunction with a graphics module to display the location of the arthroscope in real time and provide perspective views of the instrument's location.