Large Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 7
Confusion; Situational Awareness
ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance
Airspace Structure; Procedure
Aircraft X departed OAK on the CNDEL3 Departure. Leaving 2500 feet the aircraft turned left to a 200 heading.  Luckily I caught it right away and there was no aircraft departing SFO.  That turn puts the aircraft into a head on position with aircraft departing SFO. It would not take long for a midair to occur that way. The southbound departures off OAK need to be reviewed.
NCT TRACON Controller reported an aircraft on the OAK CNDEL3 Departure turned into the SFO departure path.