Originally Posted by gc1111
I am just catching up on this thread. About the confusion over "ceiling", check out http://www.thefreedictionary.com/ceiling
I don't know how authoritative this is, but their Nautical definition is:
"The planking applied to the interior framework of a ship"
In the nautical archeology course that I took a couple of years ago through the NAS
, that was also the definition used.