Everything you wanted to know about submarine sandwiches ... and wished you hadn't asked :-) :

http://en.wikipedia.org/wiki/Sub_sandwich

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>And which part is the conning tower?
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>So they think a baguette-shaped sandwich resembles a submarine, so they remove the meaning once more and call the shop "Subway" (as in underwater channels)?
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>You sure, cos that allusion is lame?