How is an indirect fire weapon like a mortar aimed? If the shooter and target are hidden in dead ground, you would need a spotter, yes? Is this all done with "old" tech, or do we use a lazer rangefinder and direction (compass point) finder coupled with a gps to establish the target coordinates and transmit to shooter/ I.E.- the spotter know his gps position, shooters gps position, and distance and angle to target, and computer figures targets gps position, and direction and trajectory from the shooter?