The Golden Compass

I have a Compass, the size about 30 cm square, with Golden ring at the both side. This compass is special compass for sailor, usually people put it at their boat. The different of this compass, because this compass it made by double layer. The first layer is water, then they put The compass floating on the water. Yes very funny for me when i saw it for the first time, ha...ha...ha..., just like people swimming in the pool, ha...ha...ha...