Trimaran racing sailboat. The sail is controlled with the trim slider, and steering with yaw. Gyros can be used to even out heel. The boat is faster when it's flat. It can take a little practice to get used to. You do habe to have wind for the boat to move, since it doesn't have any motors. Throttle doesn't do anything. Remember that it can't sail straight towards where the wind is coming from, so it has to sail at angles to it. Tr to keep about 10 degrees between where the boat is pointed and where the wind arrow is. If you are going close to where the wind is coming from, make sure the sail is almost all the way in the middle, and let it out as you turn away from the wind. Also, make sure the sail is on the side of the boat the wind would hit second, or the side that is tilting towards the water, or the boat will go backwards. Ask questions in the comments if this doesn't make sense.