Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate
2008-09-01
2009-02-17
Crosland, Donnie L (Department: 2612)
Communications: electrical
Condition responsive indicating system
With particular coupling link
C340S539110, C340S539130, C342S357490, C342S357490, C342S457000, C455S404200, C455S013400, C455S090100
Reexamination Certificate
active
07492251
ABSTRACT:
A Personal Locator Beacon (PLB), supporting two operation modes local monitoring and remote monitoring. The apparatus includes a PLB that supports the present operation mode, as well as a local monitoring mode, employing the same transmitter, and automatically switching between modes. Upon activation, the PLB first tries to communicate with a local monitoring station, at a low transmission power, and at a high repetition rate, in purpose of dealing with the PLB call locally, without involving the remote monitoring station. Then, if not acknowledged by a local monitoring station, the PLB increases its transmission power, enabling access to a remote monitoring station. In a preferred embodiment, the PLB is carried by a person onboard a vessel, to alarm upon a Man Overboard (MOB) accident, the local monitoring station is installed onboard the same vessel, and the remote monitoring station is part of a satellite Search and Rescue (SAR) system, as Cospas-Sarsat.
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Crosland Donnie L
Katz Daniel A.
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