"CONTAINS THE VISIBLE FOCAL PLANE ARRAY (FPA) ASS, VIDEO PROCESSING ELEC AND MIMAGE CORRECTION CIRCUITRY AND THUMBNAIL GEN FOR VISIBLE IMAGE CHAIN. INFO IS CLOCKED OUT OF THE FPA, DIGITIZED AND SIGNAL PROCESSED TO PRODUCE AND OUTPUT DATA STREAM THEN SENT TO THE IPU ELEC ASS. THIS UNIT IS A SUBASS CONTAINED IN THE SIU LRU OF THE KS-127A ELECTRO OPTIC (EO) AND DUAL BAND CAMERA SYS"