Forward observer

A Forward observer (FO) is an artillery specialist, knowledgeable in the characteristics of artillery howitzers, medium mortars and unguided rockets; guided missiles that can support troops; and naval guns used for shore bombardment. FOs may operate as teams, with a combination of team leader, radio operator, laser designator or other marking specialist, etc. The FO team is responsible to the supported ground organization for the proper employment of fire support. They may be attached to foot-mobile special reconnaissance teams or to conventional combat units.

The FAC may be on the ground with the supported troops, or in a specialized vehicle. In modern warfare, they are part of the larger system of controlling close support to ground forces.

An equivalent person that coordinates air support is called a forward air controller .