Narrative:

Needed WX deviation approaching adnip on R591. Requested deviation from tokyo radio several times and told to stand by. Told tokyo radio that I was using my emergency authority/authorized to deviation 25 mi left of course. Tokyo cleared me as requested right afterwards. Same scenario 2 more times. WX appeared to be centered only on R591.

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Original NASA ASRS Text

Title: B777 CREW WAS REQUIRED TO EXERCISE EMER AUTH TO AVOID CONVECTIVE WX.

Narrative: NEEDED WX DEV APCHING ADNIP ON R591. REQUESTED DEV FROM TOKYO RADIO SEVERAL TIMES AND TOLD TO STAND BY. TOLD TOKYO RADIO THAT I WAS USING MY EMER AUTH TO DEV 25 MI L OF COURSE. TOKYO CLRED ME AS REQUESTED RIGHT AFTERWARDS. SAME SCENARIO 2 MORE TIMES. WX APPEARED TO BE CTRED ONLY ON R591.

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