james m. schoonmaker museum ship had expansive xi mentioned. by the 19 fifties, that technology had been supplanted van. so, the engine was taking out and then use team turban system was placed in it and all the equipment that you see in the engine room today it's based on steam turbine technology. except for the engine of telegraph which is now the other end of the communication system with the pilot house. so when the captain wants the boat to go full ahead, he sends a signal via the communication system of the chat, burned back to the engine room, they acknowledge it and put the vote into full ahead steam power. >> so major control system here for the steam turbine allows the chief engineer to ensure that there is enough steam to turn determine which then turn to the shaft of the propeller which turns a propeller. so, all the things that there is the protection of seem, the amount of steam in the boilers, the temperature that the water is boiling at, the amount of pressure that that creates is all controlled through one mechanical systems he