The invention provides, within a ship, a passive electro-optic device for providing a measurement of the range, together with a positively identifiable image, of an approaching ship or object, day or night, on a CRT, with the range displayed digitally on the CRT. The rangefinder capability provides a substitute or supplement to radar or active-gated laser beam rangefinders for collision avoidance and station-keeping. (Author)
Passive Optical Rangefinder
1975
7 pages
Report
No indication
English
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