ZOA radar controller experienced operational error with mry traffic.

Attributes
ACN	582909
Time
Date	200305
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : sns.vortac
State Reference	CA
Altitude	msl single value : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa.artcc
Operator	general aviation : corporate
Make Model Name	Citation V
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zoa.artcc
Operator	general aviation : corporate
Make Model Name	Gulfstream III
Operating Under FAR Part	Part 91
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	flight time total : 60
ASRS Report	582909
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : separated traffic controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 25200 vertical : 500
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

G3 climbing off mry was turned 20 degrees left to avoid C650, descending for mry, also turned 20 degrees left. Both aircraft were initially head on, initial vectors did not allow for positive separation. I initially noticed the aircraft were in conflict, shortly thereafter conflict alert was activated and I began to vector the aircraft involved.

Original NASA ASRS Text

Title: ZOA RADAR CTLR EXPERIENCED OPERROR WITH MRY TFC.

Narrative: G3 CLBING OFF MRY WAS TURNED 20 DEGS L TO AVOID C650, DSNDING FOR MRY, ALSO TURNED 20 DEGS L. BOTH ACFT WERE INITIALLY HEAD ON, INITIAL VECTORS DID NOT ALLOW FOR POSITIVE SEPARATION. I INITIALLY NOTICED THE ACFT WERE IN CONFLICT, SHORTLY THEREAFTER CONFLICT ALERT WAS ACTIVATED AND I BEGAN TO VECTOR THE ACFT INVOLVED.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.