80-G-268257:  USS Lexington (CV 16), sextant training.  Commander Everett M. Block, USN, and Lieutenant Junior Grade Frederick C. Forberg, USNR, shooting the sun while QM1/C W.S. Cook takes notes.  Photographed by PHOM3 W.C. Poe, June 23, 1945.  (2015/12/01).
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