The last of the cheapest large inside cabins I could get was 1123 on the main deck. On the deck plans, it is the most aft cabin and appears to be next to some empty spaces, which are not labelled. Also, I can't tell from the diagram what type of area lies at the aft of the ship. Am I next to the engines? I can still upgrade to a J if there is going to be a problem with this location.