In the context of warfare, direct fire means aiming through a sight directly at the target. This sight may be open fore and back sight or optical.
Inclinometer Aiming point Tank guns Dundee, KwaZulu-Natal Gun laying Niccolò Fontana Tartaglia Plumb-bob Goniometer Sight Field artillery AIM Azimuth Trajectory Close air support Boer Handgun Mortar (weapon) Telescope Second Boer War Rifle Machine gun Artillery