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To confuse the human observers, ships often used dazzle camouflage, which consisted of painting lines on a ship in an effort to make determining a target's angle on the bow difficult. While dazzle camouflage was useful against some types of optical rangefinders, this approach was useless against radar and it fell out of favor during World War II.
The primary benefit of this development was that multiple objects of differing heights could be measured much faster since it removed the slow moving worm drive, which would need to be adjusted for each object height before a sight was taken with a much faster adjustable arc arm to set the object's height.
Stadiametric rangefinding is used for surveying and in the telescopic sights of firearms, artillery pieces, or tank guns, as well as some binoculars and other optics. It is still widely used in long-range military sniping , but in many professional applications it is being replaced with microwave , infrared , or laser rangefinding methods.
Stereoscopic rangefinder atop the bridge of the German cruiser Admiral Graf Spee Portable stereoscopic rangefinder with binoculars from WWII. A stereoscopic rangefinder or stereoscopic telemeter [1] is an optical device that measures distance from the observer to a target, using the observer's capability of binocular vision.
Two Diarange telescopic sights with integrated laser rangefinders. In 1997 Swarovski Optik introduced the LRS series telescopic sight, the first sight on the civilian market with an integrated laser rangefinder. [32] The LRS 2-12x50 sight can measure ranges up to 600 m (660 yd). [33]
The director was manned by a crew of 6: Director Officer, Assistant Control Officer, Pointer, Trainer, Range Finder Operator and Radar Operator. [36] The Director Officer also had a slew sight used to quickly point the director towards a new target. [37] Up to four Mark 37 Gun Fire Control Systems were installed on battleships.
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