Four training courses developed under the Job-Oriented Basic Skills (JOBS) program were evaluated to determine whether they could compensate for the skill deficiencies of lower aptitude Navy personnel. The JOBS program was designed for personnel who scored in the lower mental aptitude categories on the Armed Services Vocational Aptitude Battery to increase their mastery of the skills and knowledge deemed to be prerequisites for success in Class "A" technical schools. Volunteer recruits were randomly assigned to two groups: JOBS direct-track and JOBS delayed-track (completion of apprenticeship training and time in the fleet prior to JOBS training). Control groups were also specified. Of 1,551 students who attended JOBS school, 1,493 (96 percent) graduated. The JOBS delayed-track group had a higher percentage of attrition from JOBS school than did the JOBS direct-track group. Class "A" school data for 1,256 JOBS graduates showed that 996 (79 percent) graduated and 260 (21 percent) attrited. Comparable figures for the "A" school comparison group were 90 percent and 10 percent. Thirty-three months after JOBS and comparison groups had graduated from "A" school, the "A" school group had over twice as many fleet discharges, thus reducing the total loss rate between the two groups to 3 percent. (YLB)