Navigation system including an integrated electronic chart display
US4590569A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1983 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Oct 14, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A navigation system particularly adapted for ships making a passing within a harbor or the like, utilizing signal inputs from on-board vessel position determining equipment such as Loran or Decca apparatus and an on-board object detecting equipment such as a radar or sonar apparatus. The system further includes an on-board vessel position computer which operates in a differential Loran mode in response to observed Loran time differences, stored data from an initial calibration, and Loran grid offset data from an on-shore monitor system to compute a highly accurate current or present position fix in longitude and latitude whereupon the computer causes a predetermined electronic chart to be displayed in color on the screen of a cathode ray tube, being generated from a plurality of electronic charts stored in the form of digital files in memory. The selected chart, together with the present position of the ship, is displayed along with preselected alpha-numeric indicia of data relating to bearings, way points, ranges, "time to go", etc., also generated in accordance with the computed vessel position. Radar target returns of the local land mass and other stationary moving targets are a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.