The photon mortar was a heavy weapon used by ground force units of the United Federation of Planets.
The mortars fired photon grenades at ranges between 400 and 2,000 meters.
They weighed 1.2 kilograms.
Targetting was normally acquired from an orbital ship's sensors or a specially configured tricorder, but could be aimed manually if required.
Gedna Tachion was trained in its use.