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2. Coincidence rangefinder - Wikipedia

   en.wikipedia.org/wiki/Coincidence_rangefinder

   Coincidence rangefinders were important elements of fire control systems for long-range naval guns and land-based coastal artillery circa 1890–1960. They were also used in rangefinder cameras . A stereoscopic rangefinder looks similar, but has two eyepieces and uses a different principle, based on binocular vision .

3. Rangefinder - Wikipedia

   en.wikipedia.org/wiki/Rangefinder

   Range-Finding in the Army. How to use range-finders to get results: the erect and inverted types, Popular Science monthly, February 1919, page 118–120, Scanned by Google Books; Electro Optic Application Test Equipment, Berkeley Nucleonics Corporation, archived from the original on 2011-07-11

4. Stadiametric rangefinding - Wikipedia

   en.wikipedia.org/wiki/Stadiametric_rangefinding

   The approximate range of an object one foot (30.48 cm) in height covering roughly 100 milliradians is 10 feet (3.048 m) or: Range (r) = approximate height of object (h) × (1000 ÷ aperture in milliradians (a)) r = h(1000/a) → where r and h are identical units, and a is in milliradians.

5. Stereoscopic rangefinder - Wikipedia

   en.wikipedia.org/wiki/Stereoscopic_rangefinder

   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.

6. Eastern whip-poor-will - Wikipedia

   en.wikipedia.org/wiki/Eastern_Whip-poor-will

   A rarely seen eastern whip-poor-will by day in Philadelphia, Pennsylvania. The eastern whip-poor-will is currently in decline, though they remain fairly common. [9] In 2017, the eastern whip-poor-will was uplisted from least concern to near threatened on the IUCN Red List on the basis of citizen science observations demonstrating a decline in populations of the eastern whip-poor-will by over ...

7. Masticophis - Wikipedia

   en.wikipedia.org/wiki/Masticophis

   Adults of species in the genus Masticophis may attain a total length (including tail) from 152 cm (5 ft) for M. lateralis to 259 cm (8.5 ft) for M. flagellum.A distinctive character of this genus is the shape of the frontal scale (the large scale in the center of the upper surface of the head) which is bell-shaped and elongated.

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   www.aol.com/products/utilities/ad-free-mail

   Ad-Free AOL Mail offers you the AOL webmail experience minus paid ads, allowing you to focus on your inbox without distractions, for just $4.99 per month.

9. Laser rangefinder - Wikipedia

   en.wikipedia.org/wiki/Laser_rangefinder

   A long-range laser rangefinder is capable of measuring distance up to 20 km; mounted on a tripod with an angular mount. The resulting system also provides azimuth and elevation measurements. A laser rangefinder, also known as a laser telemeter, is a rangefinder that uses a laser beam to determine the distance to an object.