Current conventional mortar rounds used by the army only have an accuracy of about a 136 meter (446 ft) Circular Area Probable (CEP). This means that 50 percent of rounds will land within 136 m of the target, 43 percent will land between 136 m and 272 m, 7 percent between 272 m and 408 m and the proportion of rounds that land further than this is less than 0.2 percent.
The new 120 mm APMI precision rounds, which have been undergoing testing since late last year, have been able to demonstrate a CEP of less than 10 meters at ranges in excess of 6,500 meters to greatly improve accuracy and reduce the risk of collateral damage. This equates to 50 percent falling within 10 meters of the target, 43 percent between 10 meters and 20 meters and 7 percent within 20 meters to 30 meters.
GPS-guided 120mm mortar, with a circular error probable (CEP) of 16.4 feet or less and a 4.3 mile range
This is designed for a precision capability such as against a sniper in a building, or enemies in a bunker or trench. If you were to engage with a conventional mortar round, you would have to fire 8-to-10 rounds to kill or suppress the target. With APMI, you will probably be able to do the same thing with one or two rounds