Narrative:

I was trying to tag air carrier widebody transport that had not automatic-acquired on departure. At about the time I tagged widebody transport ATC's controller plugged in at south control with me and asked why the limited data block XXXX code was at 7000'. I said I did not know and had not noticed it. He showed me a strip of light transport. Both the widebody transport and the light transport codes were 7000'. I asked widebody transport and light transport to identify. At that time light transport said he was deviating right of course to avoid wake turbulence from a widebody transport passing to his left. I then advised the satcs that I believed less than standard separation had occurred between widebody transport and light transport. The computer data extract later showed 1 1/2 mi sep at the same altitude, 7000'.

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Original NASA ASRS Text

Title: WDB CAME CLOSE TO AN LTT ON DEP. LESS THAN STANDARD SEPARATION OCCURRED.

Narrative: I WAS TRYING TO TAG ACR WDB THAT HAD NOT AUTO-ACQUIRED ON DEP. AT ABOUT THE TIME I TAGGED WDB ATC'S CTLR PLUGGED IN AT S CTL WITH ME AND ASKED WHY THE LIMITED DATA BLOCK XXXX CODE WAS AT 7000'. I SAID I DID NOT KNOW AND HAD NOT NOTICED IT. HE SHOWED ME A STRIP OF LTT. BOTH THE WDB AND THE LTT CODES WERE 7000'. I ASKED WDB AND LTT TO IDENT. AT THAT TIME LTT SAID HE WAS DEVIATING RIGHT OF COURSE TO AVOID WAKE TURB FROM A WDB PASSING TO HIS LEFT. I THEN ADVISED THE SATCS THAT I BELIEVED LTSS HAD OCCURRED BTWN WDB AND LTT. THE COMPUTER DATA EXTRACT LATER SHOWED 1 1/2 MI SEP AT THE SAME ALT, 7000'.

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.