IGORR

AcronymDefinition
IGORRInternational Group on Research Reactors
References in periodicals archive ?
I read back the clearance, but due to my eyesight, cabin lights, or the late hour, couldn't find IGORR on the chart.
I heard distinctly the phonetic words for IGORR, but I simply drew a blank.
I finally got it, and found IGORR on the chart and in the 430.