Narrative:

I was working local one and departed an air carrier off of runway 29. Local two called for a release off of runway 27 with a twin piston aircraft on a 310 heading; which I approved. I thought we would have; after visual separation; 15 degrees divergence. I have been unaware that the heading of runway 29 is now 295.2 degrees. The difference in heading between a runway heading off runway 29 & a 310 heading off runway 27 is now 14.8 degrees. I was not aware of when; or that; this changed. These are the standard headings and departures that we've used for years. Recommendation; we should now start using 320 degree heading off runway 27 so as to re-establish a 15 degree divergence between departures off the different runways.

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Original NASA ASRS Text

Title: OAK tower controller expressed concern regarding current procedure allowing simultaneous departures from Runway 29 and 27 based upon 15 degrees divergence; noting Runways 29 magnetic heading has changed to 295.2.

Narrative: I was working Local One and departed an Air Carrier off of Runway 29. Local Two called for a release off of Runway 27 with a twin piston aircraft on a 310 heading; which I approved. I thought we would have; after visual separation; 15 degrees divergence. I have been unaware that the heading of Runway 29 is now 295.2 degrees. The difference in heading between a runway heading off Runway 29 & a 310 heading off Runway 27 is now 14.8 degrees. I was not aware of when; or that; this changed. These are the standard headings and departures that we've used for years. Recommendation; we should now start using 320 degree heading off Runway 27 so as to re-establish a 15 degree divergence between departures off the different runways.

Data retrieved from NASA's ASRS site as of April 2012 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.