Two widebody transport's have less than standard separation over atlantic.

Attributes
ACN	98275
Time
Date	198811
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : bda
State Reference	FO
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : bda
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : atlantic enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 15000 flight time type : 710
ASRS Report	98275
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : required legal separation other anomaly other
Independent Detector	other controllera
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 30000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

While en route gabes to deeno at FL330 in bda TCA under positive radar control with bda (128.6 mmz) air carrier B (tpa-bda) conflicted with us at FL330 position 37:00N 67:30W. Air carrier B was apparently on R-14 eastbound to destination, bda. Also was in positive radar control bda TCA (128.5 MHZ) having given a position report at priss at approximately XA12L. Air carrier B saw our aircraft and turned to avoid us. I saw him at 10 O'clock, level, estimated distance 5-6 mi after he had initiated his turn. Both aircraft were assigned FL330. However, 10 mins prior to conflict bda control asked our flight, if we could climb to FL350. We replied affirmatively. However, bda did not subsequently clear us to FL350 but rather had us maintain FL330. Apparently inability of bda control to coordination our climb to FL350 with ny oceanic led to the problem. Had bda control exercised unilateral control within its airspace and climbed our aircraft to FL350 west/O coordination with ny oceanic, this conflict would not have occurred. I recommend that bda control exercise full altitude assignment authority within its airspace west/O requirement of prior ny cta coordination in case of imminent altitude/course conflict.

Original NASA ASRS Text

Title: TWO WDB'S HAVE LESS THAN STANDARD SEPARATION OVER ATLANTIC.

Narrative: WHILE ENRTE GABES TO DEENO AT FL330 IN BDA TCA UNDER POSITIVE RADAR CTL WITH BDA (128.6 MMZ) ACR B (TPA-BDA) CONFLICTED WITH US AT FL330 POS 37:00N 67:30W. ACR B WAS APPARENTLY ON R-14 EBND TO DEST, BDA. ALSO WAS IN POSITIVE RADAR CTL BDA TCA (128.5 MHZ) HAVING GIVEN A POS RPT AT PRISS AT APPROX XA12L. ACR B SAW OUR ACFT AND TURNED TO AVOID US. I SAW HIM AT 10 O'CLOCK, LEVEL, ESTIMATED DISTANCE 5-6 MI AFTER HE HAD INITIATED HIS TURN. BOTH ACFT WERE ASSIGNED FL330. HOWEVER, 10 MINS PRIOR TO CONFLICT BDA CTL ASKED OUR FLT, IF WE COULD CLB TO FL350. WE REPLIED AFFIRMATIVELY. HOWEVER, BDA DID NOT SUBSEQUENTLY CLR US TO FL350 BUT RATHER HAD US MAINTAIN FL330. APPARENTLY INABILITY OF BDA CTL TO COORD OUR CLB TO FL350 WITH NY OCEANIC LED TO THE PROB. HAD BDA CTL EXERCISED UNILATERAL CTL WITHIN ITS AIRSPACE AND CLBED OUR ACFT TO FL350 W/O COORD WITH NY OCEANIC, THIS CONFLICT WOULD NOT HAVE OCCURRED. I RECOMMEND THAT BDA CTL EXERCISE FULL ALT ASSIGNMENT AUTHORITY WITHIN ITS AIRSPACE W/O REQUIREMENT OF PRIOR NY CTA COORD IN CASE OF IMMINENT ALT/COURSE CONFLICT.

Data retrieved from NASA's ASRS site as of August 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.