A LOCKHEED 1011 WAS DISPATCHED IN NON COMPLIANCE WITH THE #1 VHF NAV RECEIVER DEFERRED. ACTUAL WRITE-UP WAS AUTO-TUNE BUTTON INOP.

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WE WERE BRIEFED BY THE INBOUND CREW OF SOME MINOR DISCREPANCIES INCLUDING THE #1 VHF NAV AUTO-TUNE BUTTON. BEING A MINOR DISCREPANCY MAINT PERSONNEL DEFERRED THE AUTO-TUNE BUTTON ALONG WITH THE OTHER MINOR WRITE-UPS. THE MECH DEFERRING THE AUTO-TUNE BUTTON MADE AN ERROR IN THE DEFERRAL AND USED THE DEFERRAL NUMBER FOR THE ENTIRE VHF NAV RADIO INSTEAD. THERE WAS NOTHING WRONG WITH THE VHF NAV RADIO ITSELF AND THE AUTO-TUNE BUTTON WORKED AS WELL. DURING OUR PREFLT PREPARATIONS THERE WERE SEVERAL DISTRACTIONS INCLUDING HAVING TO MOVE THE ACFT TO A DIFFERENT GATE AND CONTRACTING CLEANING AND CATERING WHICH SHOULD HAVE ALREADY BEEN DONE. WITH THESE ADDED DELAYS WE WERE COMING CLOSE TO MISSING OUR SLOT TIME OUT OF ZZZZ AND WERE IN A HURRY TO GET EVERYTHING DONE. BEING THAT THE NAV RADIOS WORKED FINE AND THE DEFERRED AUTO-TUNE BUTTON WAS EVEN WORKING AND WAS A MINOR ITEM ANYWAY WE DID NOT DOUBLE-CHK THE DEFERRAL NUMBER AGAINST THE DEFERRAL. THE DEFERRAL NUMBER WAS ACTUALLY THAT OF THE VHF NAV #1 RADIO; WHICH ON PAPER MADE IT ILLEGAL FOR US TO DO CLASS II NAV. BECAUSE WE WERE UNAWARE OF THE ERROR IN THE DEFERRAL NUMBER WE SAFELY TOOK OFF AND COMPLETED THE FLT. UPON ARR AT SEA WE WERE NOTIFIED THAT THE DEFERRAL NUMBER WAS ACTUALLY THAT OF THE VHF NAV RADIO AND WE SHOULD NOT HAVE TAKEN OFF FROM ZZZZ.