mean point of impact การใช้

• Nevertheless, the mean point of impact was still some tens of yards from the target-centre aiming point.
• Combined statistics of American and NATO experience indicate that the average number of precision weapons per designated mean point of impact ( DMPI ) destroyed was 2.8.
• The result was decreasing accuracy ( the increasing distance between the target and the mean point of impact of the shells aimed at it ) caused by the increasing effects of non-standard conditions.
• Mean point of impact ( MPI ) is the calculated center of the grouping, which is the average center of all the shots, and is not necessarily located at a hole in the target.
• The chief difference between the AFCT and the AFCC was the provision of a paper plotter in the former, which could plot both own ship and target ship movement and record the mean point of impact of the salvoes fired.
• Its maximum range with the M107 projectile is the same as any 39 calibre 155-mm gun and its dispersion about the same . ( The " dispersion " figure means that 50 % of shells will fall up to the stated distance either side of the mean point of impact, but 100 % will fall within 4 times the probable error either side . ) Dispersion of this magnitude significantly reduces the tactical value of the equipment.