A vehicle guidance system. The system includes a first mechanism for tracking
a
vehicle based on time-of-arrival information associated with energy emanating from
the vehicle and providing vehicle position information in response thereto. A second
mechanism steers the vehicle based on the vehicle position information. In a specific
embodiment, the system of further includes a third mechanism for locating the target
based on time-of-arrival information associated with energy radiating from the
target and providing target location information in response thereto. The second
the second mechanism steers the vehicle based on the target location information
and the vehicle position information.