Communications – electrical: acoustic wave systems and devices – Underwater system
Patent
1994-08-12
1995-10-31
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Underwater system
367910, 367118, G01S 1114
Patent
active
054635985
ABSTRACT:
A system for automatically detecting the event of a person or object falling overboard from a vessel into water includes a portable ultrasonic transmitter worn by each person or attached to selected objects on board and designed to be activated upon immersion in water, and an alarm control unit carried by the vessel containing an ultrasonic receiver. When the receiver detects a signal produced by a portable transmitter, it sounds an alarm and displays the vector velocity of the vessel relative to the portable transmitter, allowing rescue operations to be initiated and carried out even in conditions of zero visibility.
REFERENCES:
patent: 4305143 (1981-12-01), Simms et al.
patent: 4813025 (1989-03-01), Rowland et al.
Holland Malcolm J.
Rainey Michael J.
Pihulic Daniel T.
SafeSea Systems, Inc.
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