This is a medium size submarine with a dome helm, nuclear reactor, two rudder thrusters with lights and an electric engine. Submarine features large rooms that can be furnished as desired. Some rooms have been furnished, including helm, reactor room, engine room and a functioning moonpool.
WARNING! Please note that submarine is already partially submerged in the schematic, and contains command block based redstone! Make sure to check "update command block coordinates", "copy water" and "copy air" in importing options! Some details have been accomplished using player heads. Feel free to modify the build as you wish, but try not to get rid of the engine and reactor rooms, as those also contain redstone.