This was a technique adopted to try to prevent the Luftwaffe conducting air raids on British cities using BBC transmitters for navigation.
Geoffrey Chaucer | Geoffrey Rush | Geoffrey of Monmouth | Geoffrey Moull | Geoffrey Hill | Geoffrey Keezer | Geoffrey de Montbray | Geoffrey Wilkinson | Geoffrey Howe | Geoffrey Blainey | Geoffrey Robertson | Geoffrey Keating | The Sketch Book of Geoffrey Crayon, Gent. | Geoffrey Palmer | Geoffrey Hartman | Geoffrey C. Hazard, Jr. | Geoffrey Robinson | Geoffrey Owens | Geoffrey Layton | Geoffrey Gurrumul Yunupingu | Geoffrey de Mandeville | Geoffrey de Luterel | Geoffrey Burbidge | Geoffrey | Geoffrey Winthrop Young | Geoffrey Whitehead | Geoffrey Taylour, 4th Marquess of Headfort | Geoffrey Richmond | Geoffrey Palmer (actor) | Geoffrey Munn |
:For the California poet, see Geoffrey G. O'Brien