
thumb|Portable stereoscopic rangefinder from WWII thumb|The coincidence rangefinder of the Polish destroyer ORP Wicher thumb|Laser rangefinder thumb|Second World War German range finding tower at La Corbière, [[Jersey]]
thumb|Portable stereoscopic rangefinder from WWII thumb|The coincidence rangefinder of the Polish destroyer ORP Wicher thumb|Laser rangefinder thumb|Second World War German range finding tower at La Corbière, [[Jersey]]
A rangefinder (also rangefinding telemeter, depending on the context) is a device used to measure distances to remote objects. Originally optical devices used in surveying, they soon found applications in other fields, such as photography, the military, and space travel. They were especially useful for finding the range of a target, such as in naval gunnery and anti-aircraft artillery. The word telemeter is derived .
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).