A location tracking device utilizing an acceleration sensor is described.
The acceleration sensor includes an inertial body in magnetic fluid that
is contained in a closed volume vessel. The tracking device may be used
for tracking objects, people, animals, and the like. The tracking device
may be utilized as a back-up system to a GPS system such that when signal
from a GPS receiver are unavailable, the location tracking device may
provide positional information about the location of the object.