Abstract: A method of training a human for a marksmanship task using a training apparatus, and the apparatus therefor. The apparatus senses and records motions within a time window. The method includes sensing and recording motions sensed by the one or more sensors, detecting a synchronization event, analyzing the sensed and recorded motions that were sensed in the time window, comparing the analyzed sensed and recorded motions with a set of desired analyzed motions to generate difference data; and, responsive to the comparing, presenting to the user in the user's field of perception visual feedback indicating one or both the direction and magnitude of deviation from the set of desired analyzed motions. The presenting the visual feedback to the user is essentially instantaneous, e.g., commencing no later than 10 ms (at most 100 ms) after the synchronization event.