Hard optics (lenses, prisms, mirrors), fiber optics, or electro optics (television) may be used to relay an image from the focal plane of an objective lens to a location convenient for viewing. This paper compares performance for these three relay systems as applied to ground combat vehicle sighting systems. The conclusions show that, based on resolution, hard optics and fiber optics are preferred above television. Also, hard optics generally have better image quality than either fiber optics or television. Fiber optic and television systems may best satisfy particular applications with difficult integration requirements.