"five by five" – "loud and clear" – used by pilots. "3 by 5" = less clear, etc.
http://www.askacfi.com/694/what-is-meant-by-five-by-five.htm
"five by five" – "loud and clear" – used by pilots. "3 by 5" = less clear, etc.
http://www.askacfi.com/694/what-is-meant-by-five-by-five.htm