http://www.flashcardexchange.com/tag/ocfa www.flashcardexchange.com: ocfa Flashcards en-us Wed, 15 Feb 2012 05:43:19 PST Wed, 15 Feb 2012 05:43:19 PST support@flashcardexchange.com 720 http://www.flashcardexchange.com/flashcards/view/740289 User operations during radio failure. 2009-01-29 http://www.flashcardexchange.com/flashcards/view/740289 http://www.flashcardexchange.com/flashcards/view/735551 11/8/93 2009-01-22 http://www.flashcardexchange.com/flashcards/view/735551