COMPARISON OF THE STEREOSCOPIC RANGE FINDER, Ml2 AND THE COINCIDENCE RANGE FINDER , T43 AS USED IN RANGE DETERMINATION AT NIGHT

摘要

(1) The superiority of nighttime performance on the coincidence range finder lends further support to the decision to select the coincidence instrument rather than the ster-eosoopic instrument as the optical ranging device to be used in tank gunnery. n (2) The need shown in this study for mechanical adjustment of the Internal Cor-rection System of the coincidence instrument was marked enough to indicate the importance of steps being taken to modify the ICS to reduce bias under a variety of target conditions.