1) An opening for firing through 2) Cabin brightener 3) Cabin feature 4) Cruise opening 5) It provides an ocean view 6) Ship window 7) Stateroom feature 8) Stateroom window 9) Window 10) Window of a kind 11) Window on board ship 12) Window onto the ocean 13) Window or wall opening 14) Window with an ocean view Found on https://www.crosswordclues.com/clue/porthole
A porthole is a generally circular window used on the hull of ships to admit light and air. Though the term is of obvious maritime origin, it is also used to describe round windows on armored vehicles, aircraft, automobiles (the Ford Thunderbird a notable example) and even spacecraft. On a ship, the function of a porthole, when open, is to permit ... Found on http://en.wikipedia.org/wiki/Porthole