Military aircraft was climbed to an occupied altitude resulting in less than standard separation.

Attributes
ACN	142766
Time
Date	199004
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : tay
State Reference	FL
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	other
Make Model Name	Fighter
Flight Phase	climbout : intermediate altitude
Route In Use	enroute airway : v198
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller military : 10 controller non radar : 2 controller radar : 4
ASRS Report	142766
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 24000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was working numerous aircraft in the vicinity of tay VORTAC when jax attempted to handoff 4 military aircraft within 10 mi of each other. Due to various other aircraft that were in possible conflict, I attempted to use speed control and vertical sep. I inadvertently issued a climb clearance to military X to 12000' when clearance should have been military Z. Contributing factor: supervisor attempted to split sectors during this time. Also similar sounding call signs and all 4 military aircraft were flying at different speeds. I noticed the mode C of military X climbing prior to C/a activating, but it was too late. Suggest that same type aircraft should maintain same speed and change call signs when proximity of numerous aircraft when similar call signs could cause confusion.

Original NASA ASRS Text

Title: MIL ACFT WAS CLIMBED TO AN OCCUPIED ALT RESULTING IN LESS THAN STANDARD SEPARATION.

Narrative: I WAS WORKING NUMEROUS ACFT IN THE VICINITY OF TAY VORTAC WHEN JAX ATTEMPTED TO HDOF 4 MIL ACFT WITHIN 10 MI OF EACH OTHER. DUE TO VARIOUS OTHER ACFT THAT WERE IN POSSIBLE CONFLICT, I ATTEMPTED TO USE SPD CTL AND VERT SEP. I INADVERTENTLY ISSUED A CLB CLRNC TO MIL X TO 12000' WHEN CLRNC SHOULD HAVE BEEN MIL Z. CONTRIBUTING FACTOR: SUPVR ATTEMPTED TO SPLIT SECTORS DURING THIS TIME. ALSO SIMILAR SOUNDING CALL SIGNS AND ALL 4 MIL ACFT WERE FLYING AT DIFFERENT SPDS. I NOTICED THE MODE C OF MIL X CLBING PRIOR TO C/A ACTIVATING, BUT IT WAS TOO LATE. SUGGEST THAT SAME TYPE ACFT SHOULD MAINTAIN SAME SPD AND CHANGE CALL SIGNS WHEN PROX OF NUMEROUS ACFT WHEN SIMILAR CALL SIGNS COULD CAUSE CONFUSION.

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.