Warrant Officer Basic Course (WOBC) is the technical training program a newly commissioned U.S. Army Warrant Officer receives after attending Warrant Officer Candidate School. WOBC is designed to certify warrant officers as technically and tactically competent to serve in a designated military occupation specialty. WOBC is the first major test a newly appointed officer must pass to continue serving in the Army as a warrant officer, as W01 appointments and award of a Warrant Officer MOS are contingent upon successfully completing WOBC.