Cryptologic Technician (Technical) Seaman Antron Johnson-Gray checks the wet bulb globe temperature meter.

PENSACOLA, Fla. (May. 24, 2010) Cryptologic Technician (Technical) Seaman Antron Johnson-Gray, a student at the Center for Information Dominance (CID) Corry Station, checks the wet bulb globe temperature meter, or WBGT meter, at Corry Station. The WBGT index indicated the base would be flying the black flag for the first time in 2010, indicating vigorous outdoor exercise, regardless of conditioning or heat acclimatization, is not advisable. (U.S. Navy photo by Gary Nichols) File# 100524-N-5328N-671