[ THE POSIO (TM) DIVER POSITIONING SYSTEM EXPLAINED ]
On the surface, the wrist unit uses its GPS receiver to obtain positional information.
Upon submerging, where the GPS signal is not available, it relies on the
navigation transmitter based on POSIO (TM) technology for navigational data.
The navigation transmitter uses divers swimming motion capture sensors
to measure diver's real-time position, speed, heading and distance
information underwater. The resulting 3D underwater route is recorded
and shown graphically in real time on the user interface as a continuous