where is radio antenna

From:         jdo@uow.edu.au (John Oliver)
Organization: University of Wollongong, NSW, Australia.
Date:         31 Aug 94 02:17:23 
Followups:    1
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  or MIME structure

Can anyone tell me where the radio antennae are located on jumbo jets? I
assume they are not inside the metal hull since an electromagnetic field can
not penetrate a metallic conductor.

John Oliver