Buoys – rafts – and aquatic devices – Water rescue or life protecting apparatus – Air-sea rescue device
Patent
1998-03-18
1999-11-23
Dayoan, D. Glenn
Buoys, rafts, and aquatic devices
Water rescue or life protecting apparatus
Air-sea rescue device
441 80, 342 4, B63C 900, B63C 908, H01Q 1700
Patent
active
059890878
ABSTRACT:
A method is presented for detecting a body at sea. A lidar system provided nboard an aircraft transmits radiation at a wavelength in the blue/green region of the energy spectrum towards the surface of the sea. The lidar system is tuned to receive return reflections occurring over a specified wavelength range. A shaped area located near the body is designed to inhibit any return reflections that would be detectable by the lidar system. The shaped area defines a shape that is abnormal for the area of the sea being searched and defines a size that is larger than the body. The presence of the body is indicated by a null return corresponding to the shape and size of the shaped area.
REFERENCES:
patent: 5267329 (1993-11-01), Ulich et al.
patent: 5421287 (1995-06-01), Yonover
patent: 5710989 (1998-01-01), Flood
Cordes Brett W.
Lloyd, Jr. Jack M.
Dayoan D. Glenn
Gibert Harvey A.
Muldoon Patrick
Peck Donald G.
The United States of America as represented by the Secretary of
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