System and method for extending GPS to divers and underwater...

Details System and method for extending GPS to divers and underwater... System and method for extending GPS to divers and underwater...

2011-06-28

2011-06-28

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Underwater system

C367S128000

Reexamination Certificate

active

07969822

ABSTRACT:
A navigation system extends satellite navigation to divers, underwater vehicles, and surface vessels. The navigation system comprises a location reference unit and a plurality of sub-surface beacon units. The location reference unit includes a receiver to receive navigation signals from earth-orbiting satellites and/or an inertial navigation system. The location reference unit further includes control circuits to communicate with to sub-surface beacon units and to transmit location information to said sub-surface beacon units, and a transceiver to transmit location information to the sub-surface beacon units. The beacon units include control circuits to determine the location of the beacon unit based on location information received from the location reference unit, and a transceiver to receive location information from the location reference unit and to transmit location information to a guided unit to provide navigation assistance to the guided unit.

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