A watercraft control system includes a transmitting device and a watercraft
control device which receives transmitted signals from the transmitting
device and maneuvers the watercraft to a fallen driver, pursues a diver,
or the like. The transmitting device can also unlock various devices and
systems on the watercraft by generating an authentic ID code. In other
embodiments, a signal intensity is monitored to trigger a guidance system,
while still other embodiments replace the transmitting device with
on-board sonar systems.