Measuring apparatus having an indicator for displaying tide or tidal current data
US5363307A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1992 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Mar 4, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/96
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring apparatus such as a fish school detecting apparatus or a navigation apparatus which displays tide or tidal current data and is installed on a ship. The measuring apparatus comprises a transmitter/receiver for emitting ultrasonic search signals and receiving echo signals resulting from the search signals, a signal processor for processing output signals of the transmitter/receiver to produce signals representative of underwater conditions, a first memory for storing the signals outputted by the signal processor, a second memory having stored tide or tidal current data corresponding to ages of the moon in relation to points on the earth, a position signal inputting device for inputting latitude and longitude signals representative of a desired point on the earth, a time inputting device for inputting data representative of a day and an hour, a data searching device for searching relevant tide or tidal current data in the second memory based on inputted latitude and longitude and a day and hour data and reading the searched data, and an indicator for displaying tide or tidal current data searched by the data searching device or signals outputted by the first memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.