A jacket of biological compatible material has an internal volume dimensioned for an apex of the heart to be inserted into the volume and for the jacket to be slipped over the heart. A network is described having a phone switch at a central office configured to receive signals for transmission to and from a target, such as the target of a criminal investigation. The threaded portion of the plunger is movable through the threaded throughbore barrel by pushing the plunger in the axial direction, and by rotating the plunger. The detection means is a laser altimeter or a combination of preset longitudelatitude coordinates for tower locations and a GPS unit which supplies continuous longitudelatitude coordinates for the aircraft location for comparison to those preset coordinates.