Eg&g, Inc.

Richard I Scarlet

Seymour Goldberg

David K Nergaard

James B Andrews

William F Henning, Ii

A remote sensing system including a control module coupled to a remote device module via an optical fiber is disclosed. The device module includes circuitry for detecting changes in physical parameters and for transmitting data relating thereto back to the control module in serial form via the optical fiber. Power for the circuitry within the device module is obtained from a photodiode which receives light from the control module via the optical fiber and no power multiplication is utilized except which the remote module is transmitting serial data back to the control module. Data signals are also provided from which monitoring of the integrity of the device module and connections thereto can be obtained.

Remote optical sensing device and method

A method and apparatus for determining lane count error in a conventional navigational system which gives the position of a vessel in an integer and fractional lane count format but has an inherent integer lane count ambiguity. A second navigational system capable of determining the distance between the vessel and a surveyed transponder or other fixed element is placed on board the vessel. Readings are taken from both the conventional and the second navigational system at at least two separate positions of the vessel. By combining and comparing the data obtained from both systems, an operator can determine the lane count error in the conventional system.

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Boxborough, MA, United States of America

Richard I Scarlet