Current According to　the result of the corroborative experiment of Mega-Float(hereafter called The Experiment) it is confirmed that the current is reduced a little just beneath the bottom of the floating structure and that in a little bit lower zone apart from the bottom it is almost unchanged from that around it, and also confirmed that due to the existence of the adequate current under the floating structure the current around it is unchanged. Furthermore, little impacts to the current are found around the floating structure of several thousand meters in the current simulation analysis.