Narrative:

Aircraft X was about to depart IFR and nct coordinator called us about his beacon code. This led us to forget to obtain IFR departure release because I did not remember that diablo sector is open. Normally; when diablo is not open we have auto releases on prop departures on nimi or H315 departures. It was not until we had the next IFR departure that I inquired to the trainee if we got a release on aircraft X and she said she just launched him.we should have been using the crash fire rescue equipment placard when diablo is open to avoid forgetting.

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Original NASA ASRS Text

Title: OAK Tower Controller describes situation where an aircraft departed without a release. Controller also states there is a placard to remind them to obtain the release that they weren't using.

Narrative: Aircraft X was about to depart IFR and NCT Coordinator called us about his beacon code. This led us to forget to obtain IFR departure release because I did not remember that Diablo Sector is open. Normally; when Diablo is not open we have auto releases on prop departures on NIMI or H315 departures. It was not until we had the next IFR departure that I inquired to the trainee if we got a release on Aircraft X and she said she just launched him.We should have been using the CFR placard when Diablo is open to avoid forgetting.

Data retrieved from NASA's ASRS site 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.