Tachymetric Anti-aircraft Fire Control System

Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. A tachymetric
anti-aircraft fire control system refers to a method of generating
target position, speed, direction, and rate of target range change, by
computing these parameters directly from measured data. The target's
range, height and observed bearing data is fed into a computer which
uses the measured change in range, height and bearing from successive
observations of the target to compute the true range, direction, speed
and rate of climb or descent of the target. The computer then calculates
the required elevation and bearing of the AA guns to hit the target
based upon its predicted movement.