Hatchway

from WordNet (r) 3.0 (2006)

hatchway
    n 1: an entrance equipped with a hatch; especially a passageway
         between decks of a ship [syn: {hatchway}, {opening},
         {scuttle}]

from The Collaborative International Dictionary of English v.0.48

Hatchway \Hatch"way`\ (-w[=a]`), n.
   A square or oblong opening in a deck or floor, affording
   passage from one deck or story to another; the entrance to a
   cellar.
   [1913 Webster]