Boots – shoes – and leggings
Patent
1992-03-04
1994-11-08
Black, Thomas G.
Boots, shoes, and leggings
364449, 367113, G01S 762, G01P 500
Patent
active
053633075
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a measuring apparatus such as a navigation apparatus or a fish school detecting apparatus or the like which displays tide or tidal current data and is installed on a ship.
BACKGROUND ART
There is a close relationship between tides or tidal currents and an amount of fish catch in a fishery. Particularly, in angling, fish schools can be effectively detected and caught by paying attention to a tide or a tidal current to find a good fishery. Since an amount of fish catch depends on a tide or a tidal current in an angling area, it becomes very important in fishing to obtain tide or tidal current data in an expected area and at a day and hour beforehand and to take into account the tide or the tidal current at an area when fish schools are detected.
When a ship proceeds through a strait or the like, tides or tidal currents may become obstructions, or they may help a ship to advance efficiently. Thus, it is important to know beforehand tides or tidal currents along a route the ship proceeds or to know a tide or a tidal current at the present position of the ship.
Conventionally, such tide or tidal current data have been edited by, for example, the Maritime Safety Agency to produce tides or tidal currents table. Thus, it has been possible to know tide or tidal current conditions corresponding to ages of the moon at various points in Japan.
However, the tides and tidal currents table is voluminous, since there are described therein tides or tidal currents data corresponding to ages of the moon at many points throughout Japan. It has taken much energy and a long time to search the relevant tide or tidal current at a desired place and a desired day and hour out of the data in the table.
DISCLOSURE OF THE INVENTION
An object of the present invention is to provide a display apparatus for displaying tidal current data which has stored tidal current data in a memory, reads in a short time period, tidal current data corresponding to a desired place and a day and hour and displays the data read out.
Another object of the present invention is to provide a display apparatus for displaying tide or tidal current data which has stored tide or tidal current data in a memory, reads in a short time period tide or tidal current data corresponding to a desired place and a day and hour and displays the data read out.
Another object of the present invention is to provide an underwater detection apparatus which displays tidal current data corresponding to a desired place and a desired day and hour.
Another object of the present invention is to provide an underwater detection apparatus which is capable of predicting a good fishing area and a time range suitable for fishing.
Another object of the present invention is to provide a navigation apparatus which displays water current information at a desired place and a desired day and hour.
Another object of the present invention is to provide a navigation apparatus which is capable of advancing a ship efficiently.
Another object of the present invention is to provide an underwater detection apparatus which displays tide or tidal current data corresponding to a desired place and a desired day and hour.
Another object of the present invention is to provide a navigation apparatus which displays tide or tidal current information corresponding to a desired place and a desired day and hour.
Another object of the present invention is to provide a fish detection apparatus which is capable of displaying tide or tidal current information relating to the present position of own ship in addition to displaying underwater conditions.
Another object of the present invention is to provide a navigation apparatus which displays tide or water current flow information relating to the present position of own ship.
According to a first feature of the present invention, a tide or tidal current data indicating apparatus comprises a tide or tidal current data storing means having stored tide or tidal current data corresponding to ages of the moon at respective
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patent: 5040414 (1991-08-01), Graebner
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GPS-Based Vessel Position Monitoring and Displaying System; Reynolds et al; IEEE AES Magazine; Jul. 1990; pp. 16-22.
Black Thomas G.
Furuno Electric Company Limited
Zanelli Michael
LandOfFree
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