Specialized passenger staterooms are found within the Decks 10 - 12 dorsal levels. These cabins are capable of maintaining the environments often required by non-humanoid passengers. Atmospheric variations, including ammonia, hot methane, and seawater, fulfill the life support requirements of any member species of the Federation. These specially insulated compartments are equipped with windows, and require, on the average, four hours of preparation time before occupancy.