#sighting device

• Alidade — A sighting device or movable part structurally integrated into geodesic, topographic, or astronomical instruments (such as theodolites, sextants, or telescopes) that rotates around a central axis. This precision assembly carries index marks, verniers, or reading microscopes, being utilized for the rigorous measurement of azimuthal or vertical angles by achieving perfect visual alignment with field landmarks.
• Sighting apparatus — That aims or serves to fix the gaze or attention; an element, factor, or instrument that forces a steady focus. As a noun, it describes a person who stares fixedly, an unwavering observer, or, in an archaic technical sense, a rudimentary sighting device used to guide the trajectory of a weapon or optical apparatus.
• Sighting apparatus — That aims or serves to fix the gaze or attention; an element, factor, or instrument that forces a steady focus. As a noun, it describes a person who stares fixedly, an unwavering observer, or, in an archaic technical sense, a rudimentary sighting device used to guide the trajectory of a weapon or optical apparatus.