Trilithic, Inc.

Randall S Estep

An underwater diving mask for use by a diver in an underwater diving environment has a viewing portion defined by the diver's face and a lens, a visual display device proximate the viewing portion to provide visual images to the diver, a speaking chamber configured to sealing engage a portion of the diver's mouth to permit the diver to speak, and a sound transducer located proximal the speaking chamber. A computer system is disposed in a portion of the mask and is operatively coupled to the sound transducer and to the visual display device, where the computer system, the viewing portion and the speaking chamber are sealing isolated from the underwater diving environment. The computer system receives electrical signals produced by the sound transducer and is configured to recognize and identify the electrical signals as spoken words of the diver, such that the identified spoken words provide input to the computer to direct the computer system to provide visual images to the visual display in response thereto, to facilitate hands-free operation of the diver.

Diving mask with embedded computer system

Underwater position determination is provided by combining sonar-derived ranging data between a sonar receiver and a sonar transmitter with GPS position data to provide geographically-referenced position data accurately representing the position of a sonar receiver carried or worn by a diver or submersible vehicle. Function and accuracy enhancements are provided to compensate for diver and sonar transmitter and depth difference and differences of sonar signal propagation speed as well as several techniques of compensation for change of position of the GPS receiver and for logging diver and/or vehicle path.

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Harrisonburg, VA, United States of America

Randall S Estep