Assertion: reflector sight | /r/ObjectUse | used as a weapon sight
Facets:
value: in german aircraft
type: LOCATION
Source sentences:
text: Reflector sights were first used as a weapon sight in German aircraft towards the end of World War I. Over the years they became more sophisticated, adding lead computing gyroscopes and electronics (the World War II Gyro gunsight) radar range finding and other flight information in the 1950s and 60s, eventually becoming the modern head-up display.