Above deck unit for automatic identification system
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United States of America Patent
Stats
-
Feb 18, 2003
Grant Date -
May 2, 2002
app pub date -
Oct 5, 2001
filing date -
Oct 27, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An above deck unit for an AIS (automatic identification system) is externally installed on a ship. The above deck unit includes a radio circuit and an associated antenna for transmitting and receiving a message, a position detector and an associated antenna, associated controller and power supply, and a container for storing these elements. An inboard transmission path, e.g., a cable, connects the outdoor unit for the AIS and an AIS display serving as an interface means for the crew. A signal to be transmitted through the inboard transmission path is a processed, for example, an amplified signal, rather than an unprocessed output of a VHF antenna. Therefore, problems of signal loss or degradation along the inboard transmission path are unlikely to occur. Because the unit is incorporated within a single container, it can easily be installed and transferred. With this antenna complex, it is also possible to suppress interference between antennas.
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