Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1990-03-14
1991-10-22
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
364449, 340995, G01S 302
Patent
active
050599704
ABSTRACT:
A navigational aid comprises a housing with a flat, transparent liquid crystal display. The display is flat and flush with the bottom of the housing, to allow the aid to be placed flat on a map or chart. The aid is microprocessor controlled and accepts plug in memory modules, which contain information relating to an area through which a craft, for example, an aircraft, is to be navigated. The display generates cursors which can be superimposed on the map. The aid can display graphically the progress of the craft, superimposed on the map, on the basis of input data supplied by the user. Alternatively, the cursors can be moved to measure the distance beteen points on the map.
REFERENCES:
patent: 4053893 (1977-10-01), Boyer
patent: 4757455 (1988-07-01), Tsunoda et al.
patent: 4862374 (1989-08-01), Ziemann
patent: 4890104 (1989-12-01), Takanabe et al.
Cawood Dan C.
Holderness Anthony D. B.
Raubenheimer Dennis A.
Rawlings Geoffrey J.
Rijkheer Etienne
Blum Theodore M.
Invention Factory (Proprietary) Limited
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