C/o 1 linear interferometer-10766a, 2 linear retroreflector-10767a, 2 bases-10784a, 3 height adjustor posts-10785a, 1 case-10786a; accuracy-porm 0.1 parts per million in vacuum at 20.0 degrees c, resolution-1.0 uin, measurement range 0-130 ft, pwr. Requirements-120/220 vac, 48-66 hz, 175 va max.; measures distance and velocity