1) A sea 2) Roof 1) Cut of beef 2) Main deck 3) Not belowdecks 4) On deck 5) On deck, on ships 6) On the main deck 7) On the open deck 8) Shelter deck 9) Up on deck 10) Up on the deck 11) Upper surface 12) Weather deck 
On or above a weather deck, a deck wholly exposed to the elements.
ship's upper deck.
[n] - (usually plural) weather deck
noun (usually plural) weather deck; the part of a ship`s hull that is above the waterline